59
page
60
page
62
page
68
Mechanics
page
70
page
73
science
®
60
mechanics
Statics
Iron weights
Calibrated weights made of galvanized iron. With eye hook and
marked with the value of the mass.
Centre of gravity
plates
Set consisting of 2 irregular
polygons made of aluminium
plates, approx. 250 mm
long. Corners and centre of
gravity equipped with holes
for suspension. Use item no.
1905.10 for suspension.
1900.00
0960.10
0960.20
0960.30
0960.40
Mass
Mass
Mass
Mass
500 g,
1000 g,
2000 g,
5000 g,
45 mm
60 mm
75 mm
100 mm
0960.40
0960.30
1900.00 Centre of gravity
plates
0960.20
0960.10
Lever
For experiments with the lever principle and torque. Made of
nickel-plated brass and equipped with 30 holes numbered
from the middle for suspension of weights.
1905.00 Lever
Stability apparatus
1905.10
1905.00
Used to illustrate how stability
depends upon the location
of the centre of gravity with
respect to the base. The
centre of gravity is well
defined and can easily
be changed.
Materials: Enamelled
steel bars with plastic
plates.
Base: 100 x 120 mm,
Height: max. 260 mm.
1920.00
1920.00 Stability
apparatus
Handle with pin
For suspension of no. 1905.00 and 1900.00.
1905.10 Handle with pin
Weights with hooks
Convenient in many situations where a given vertical force is
needed. Specifically useful when used with lever no. 1905.00.
All weights have mass engraved.
1910.02
1910.05
1910.25
1910.55
1910.75
1910.85
200 g
100 g
50 g
20 g
10 g
5g
2085.00
1910.55
2095.00
Pulley on steel rod
Weights with hooks – Assortment
Two of each of weights 5, 10, 20, 50, 100 and 200 g.
Low friction Ø 47 mm plastic pulley. Mounted on a Ø 10 mm
fixing rod, length of rod 200 mm.
1910.90 Weights with hooks - Assortment
2085.00 Pulley on steel rod
Pulley with clamp
Plastic pulley Ø 47 mm. Supplied with clamp for mounting on
e.g. a retort stand rod.
2095.00 Pulley with clamp
®
science
mechanics
61
Pulley blocks in line
Pulley block set comprising 2 in line pulley blocks, each consisting of 3 pulleys. Pulley diameters 34, 40, and 47 mm.
Length: 175 mm. Stand material not included.
2106.40 Pulley blocks in line
Pulley block
Set consists of 2 blocks with 3 pulleys Ø 40 mm.
Stand material not included.
2106.30 Pulley block
2106.40
2106.30
Friction
Friction block
This wooden block with a square cross section has surfaces
with rubber, felt, sandpaper and wood. Provided with a hook
at one end. Size: 60 x 60 x 300 mm.
1925.00
1925.00 Friction block
Friction block, area
1925.10
This item is for experiments with friction versus contact area.
Two different areas can be used with the same mass. Provided
with a hook at one end.
Size: 300 x 50 x 26 mm.
1925.10 Friction block, area
Air cushion disc with balloon
For demonstrating almost frictionless movements. The disc
consists of a circular plastic plate with an air hole and with
a fitting for a rubber stopper with a hole for mounting a balloon. Air from the balloon passes through the hole in the plate,
causing the disc to hover on a cushion of air. Acrylic plate diameter 115 mm.
1945.10
1945.00 Air cushion disc with balloon
1945.00
Balloons in package
1945.10 Round balloons, 100 ea.
Inclined plane
Inclined plane 1000 mm x 150 mm made of aluminium. A holder for dynamometer (item no. 1038.00 -.80) is provided at one
end. This plane can be used for experiments in both statics
and dynamics as well as for investigating friction.
1938.10 Inclined plane
1938.10
science
®
62
mechanics
Linear Air Track
Unique quality and superiour design.
Because of the extremely low friction your results will be up
to 25% better compared to similar systems based on trolleys.
Air track, standard
Standard version. The complete air track consists of the
following parts: Air track 2 m, standard accessories in a plastic
box, and two carts.
1950.00 Air Track, standard
Air track
The ideal equipment for experiments with uniform motion,
constant acceleration, Newton’s second law, conservation
laws, elastic and inelastic collisions.
The air track is made from a large square aluminium extrusion
in conjunction with a supporting “U” channel. A series of seven
screws allow adjustment of the air track to a typical linearity
of ± 0.03 mm. The air track rests on three rubber feet, two of
which can be height adjusted.
Each side of the track has a scale graduated in mm. The overall
length of 2 meters provides a working length of 1.9 meters.
Two carts and a standard set of accessories are included. The
set includes a selection of carefully balanced plug-in parts (a
hook for string attachment, bumpers for elastic and inelastic
collisions) all weighing 10 g. These are all provided with a 4 mm
plug that fits into holes at the end of the carts as well as at the
end stops of the track.
Two flags of different lengths are provided for timing with the
1975.50 photocell units (photocells are not included). A set of
weights are included in order to increase the mass of one of
the carts by 50 or 100 %.
1950.00
Air track, C-profile
As no. 1950.00 but supplied with a “C” profile on the side for
fixing photocell unit no. 1975.10.
1950.10 Air Track, C-profile
1950.10
®
science
mechanics
Standard air track accessories
63
1960.10
Numbers in [square brackets] indicate the number of each item
included in 1950.00, 1950.10 and 1950.02. The items can also
be ordered individually using the part numbers below.
Bumper fork with rubber band [3]
For use with 1955.10 for elastic collisions. Also used with firing
mechanism 1952.00. Mass: 10 g.
1955.00
1955.10
1955.00 Bumper fork with plug
Bumper plate [3]
For elastic collisions. Used with 1955.00. Mass: 10 g.
1955.20
1955.10 Bumper plate with plug
Needle [1]
1955.30
Used with 1955.30 for inelastic collisions. Mass: 10 g.
1955.20 Needle with plug
1965.00
Tube with wax [1]
Used with 1955.20 for inelastic collisions.
1955.30 Tube with wax and plug
Holder with hook [1]
1955.40
Used as pulling hook for acceleration experiments. Mass: 10 g.
1955.40 Holder with hook and plug
Flag 25 mm [2]
Used with 1975.50 Photocell unit for time measurements.
Mass: 5 g.
1955.60 Flag with plug, 25 mm
1955.60
Flag 100 mm [1]
Used with 1975.50 Photocell unit for time measurements.
Mass: 10 g.
1955.50
1955.50 Flag with plug, 100 mm
Weight for cart [4]
Additional weight for air track cart 1960.00. Mass: 50 g.
1960.10 Weight for air track
Pulley [1]
Low friction ball bearing pulley. Used for acceleration experiments. Mass: 13 g.
1965.00 Pulley with plug
Standard air track accessory set
1950.02
As described above and supplied in a plastic box with lid.
Carts for Air Track are not included.
1950.02 Standard air track accessory set
Cart for air track
Made of black lacquered aluminium. Supplied with mounting
holes for accessories. Length: 125 mm. Mass: 170 g.
1960.00
1960.00 Cart for air track
science
®
64
mechanics
Air track accessories
Flag for side mounting
Flag for mounting on the side of the air track cart. Used with
special side mounted photocell units (1975.15) on a 1950.10 air
track. Supplied with a compensation weight to be placed on
the opposite side of the cart. Total mass: 10 g. Width: 30 mm.
1955.85 Flag for side mounting
Flag with notch for side mounting
For old electronic counters type 2001.00 or earlier.
Flag for mounting on the side of the air track cart. Used with
the special side mounted photocell units (1975.15) on a 1950.10
air track. Supplied with a compensation weight to be placed
on the opposite side of the cart. Total mass: 10 g.
Measurement length 20 mm.
1955.80 Flag with notch for side mounting
Flag with notch and plug
For old electronic counters type 2001.00 or earlier.
Supplied with a notch for actuating start/stop of the counter by
means of photocell units. Starts and stops the counter on the
high to low transition.
Measurement length: 25 mm.
1955.85
1955.80
1955.70 Flag with notch and plug
Slotted weights for air track
Used with a pulley for accelerating an air track cart. The holder
weighs 2 g, and the following weights are included: 1 g (2 ea.),
2 g, 5 g, 10 g. Combinations from 2 g to 21 g in increments of
1 g are possible.
1963.00 Slotted weights for air track
1955.70
®
1963.00
science
mechanics
65
Electric launcher
The electric launcher – together with one 1955.00 from the
standard accessory set – allows you to launch the cart with
reproducible initial speed. The tension of the rubber band
controls the speed. Without the 1955.00, the cart can be released with initial velocity 0 m/s.
Typically used with a 1985.00 switchbox which also provides
a start pulse for a timer.
Two carts can be launched simultaneously by coupling two
electric launchers to the same switchbox.
The set consists of:
– Iron core 20 x 20 x 51 mm with mounting screw (1964.00)
– Coil with 400 windings (4625.20)
– Anchor with plug connector (1955.90)
1952.00
1952.00 Electric launcher
1985.00
Switch box
When the switch box is operated, it cuts the current to the
“Coil” output while simultaneously sending a signal to a
2002.60 student timer or 2002.50 electronic counter.
Used with 1952.00 electric launcher and an 8 V DC supply.
1985.00 Switch box
Photocell unit
The unit is suitable for measuring time intervals e.g. for
experiments on an air track, pendulum period, period of
rotation, etc. The unit consists of a photocell illuminated by a
light emitting diode via a one millimetre aperture.
Two LED indicators are provided. Red: The unit is powered.
Green: Light reaches the receiver.
The photocell unit is provided with two 6 pole DIN connectors for connection to the electronic counter no. 2002.50 or
2002.60 and for daisy chain connection to additional photocell units, when signals are to be sent to the same input connection on the counter. Connector cable is included.
The unit has a rugged plastic housing with threads for
horizontal or vertical mounting using the 10 mm mounting rod
provided.
Gap width: 90 mm.
Dimensions: 160 x 120 x 28 mm.
1975.50
1975.50 Photocell unit incl. cable and mounting rod
Photocell unit for 1950.10
Used for timing on the 1950.10 air track together with a flag
for side mounting (1955.85 or 1995.50). The unit can only be
used with the 1950.10 air track – not with 1950.00.
Position on the air track is easily read
thanks to the indicator. The unit is
secured with a finger screw. Compatible
with our timers and counters (2002.60
and 2002.50).
1975.15 Photocell unit for 1950.10
1975.15
science
®
66
mechanics
1968.00
1967.00
1969.00
Air switch
Air blower
To be placed between air hose and air track in order to switch
off the air supply.
Adjustable end stop
Extremely quiet air blower with continuously adjustable speed.
The air blower is designed specially for operation of the air
tracks 1950.00 and 1950.10. Complete with 1.7 m hose. Mains
supply: 220-240 V AC.
Dimensions: 280 x 250 x 210 mm.
Made of anodized aluminium with a 4 mm hole for plug-in units.
1970.60 Air blower
1967.00 Air switch
1968.00 Adjustable end stop
Protective cover for air track
Dust cover of soft plastic with lead band.
1970.60
1969.00 Protective cover
Coupled harmonic oscillators
You can link up to five air track carts together for the study of
coupled harmonic oscillators, or you can use a single cart with
one or more springs for a detailed, quantitative study of simple
harmonic motion.
Additionally you can use a 2185.00 electromechanical vibrator
and a 2502.50 function generator in order to drive the coupled
oscillators at a controlled frequency.
The set consist of the following parts:
1969.00 Cart for air track 3 ea. (2 ea. supplied with the air track)
1960.10 Weight for cart 6 ea.
2155.20 Spring connectors 6 ea.
1972.00 Coupled Harmonic Oscillators
Electronic counter
This timer/counter is ideal for experiments with the air track.
Special settings for simple start/stop, acceleration, collision,
etc.
The timer/counter can be used with all our photocell units,
2485.10 microphone, 1980.10 free fall apparatus and much
more.
See complete specifications on page 7.
2002.50 Electronic counter
2002.50
1972.00
1960.10
2155.20
®
science
mechanics
67
Conservation of momentum
Curved ball track
Used for two dimensional collision experiments. A simple but
dependable apparatus for demonstrating elastic and inelastic
collisions in two dimensions.
The impact points of the ball on the floor are recorded with
carbon paper. Because the fall time to the floor is constant and
easily computed, horizontal distances can be converted into
velocities, permitting the momentums to be computed.
The set consists of a curved ball track with mounting hardware,
two 12 mm steel balls, one 12 mm glass ball and a hollow
25 mm wooden ball. A weight and plumb line are also supplied.
1992.20
1992.20 Curved ball track
Required accessories:
1992.10 Carbon paper, 100 pcs. A4
Steel balls
These balls are used for experiments involving
motion and energy.
1997.10 Diameter 40 mm
1997.20 Diameter 28 mm
1997.30 Diameter 25 mm
1997.40 Diameter 20 mm
1997.50 Diameter 18 mm
1997.60 Diameter 16 mm
1997.70 Diameter 12 mm
1997.80 Diameter 10 mm
1997.85 Diameter 6 mm
1997.90 Diameter 3.2 mm, 200 pcs.
1997.10-85
Glass balls
1999.00 Diameter 16 mm (approx.)
1999.00
1997.90
Collision apparatus
The apparatus is excellent for illustrating conservation of
momentum and kinetic energy in collisions. The collision
apparatus is supplied with 5 ea. Ø 25.4 mm nickel coated steel
balls suspended by double strings in a robust wooden frame.
Length:227 mm
Width: 183 mm
Height: 222 mm
2115.10 Collision apparatus
2115.10
science
®
68
mechanics
Free fall
Free fall apparatus
Free-fall tube
For demonstrating that all bodies
fall with the same speed in a
vacuum.
Consists of an acrylic plastic
tube Ø 30 x 900 mm, stopper
with valve, magnet, steel ball and
paper disc.
1977.00 Free-fall tube
Falling bodies
apparatus
1977.00
Demonstrates how the vertical
free fall is independent of any horizontal component of velocity.
Place one ball on each end of the swing arm and push the trigger. One ball is dropped and the other is launched horizontally,
the simultaneous “click” as both balls hit the floor at the same
time proves the point.
Supplied with two Ø 19 mm balls in a storage pocket.
Dimensions: L 180 mm, W 170 mm, H 50 mm.
This equipment is used in free fall experiments, showing the independence of the mass of the falling object, testing the equations of motion. Even the situation where aerodynamic drag is
no longer negligible can be covered.
The free fall apparatus works with the 2002.50 electronic
counter or the 2002.60 student timer.
Connections are done with standard 4 mm safety connector.
The release mechanism at the top sends a start pulse to the
timer when the ball is released, and a stop pulse is generated
when the ball hits the contact plate at the bottom. No external
power supply is needed – no risk of overheated coils.
Four gold-plated steel balls and a ping-pong ball with metal
thumb tacks are provided. Also included is a mirror to minimize
parallax errors. Cables and stand not included.
1980.10 Free fall apparatus
1990.00 Falling bodies apparatus
1980.10
1990.00
Falling bodies apparatus – linear model
The apparatus is placed on a corner of a level table. When released, one ball drops vertically while the other shoots out with
an adjustable initial horizontal velocity. The balls hit the floor
simultaneously, thus demonstrating that the vertical motion is
independent of any horizontal motion.
1990.10 Falling bodies apparatus – linear model
1990.10
®
science
69
mechanics
Ticker tape timer
For measuring elapsed time of linear
motion. The timer comprises an AC coil
acting on a spring suspended marker
plate which in conjunction with a spring
loaded ball makes dots on the ticker tape
with the time interval 0.01 sec. Ø 64 mm
carbon paper discs are used for marking.
The top plate with the AC coil is hinged to
the steel body and locked by means of a
magnet.
2005.00
2005.00 Ticker tape timer
2005.70
Rod with mounting bracket
Appropriate for mounting of timer
2005.00 as shown in the photo on the
right. Bracket with enamel finish and a
Ø 10 mm stainless steel rod.
Total length: 230 mm.
2005.70 Rod with mounting bracket
Carbon paper discs
For ticker tape timer 2005.00. Package of 50 ea. Diameter
64 mm.
2005.30 Carbon paper discs
Ticker tape for timer
18 mm wide tape for timer 2005.00, 360 g roll.
2005.20 Ticker tape
2005.20
2005.60
Drop weight
2005.50
Nickel-plated iron weight with self tightening locking
mechanism for the tape, for use with ticker tape timer.
2005.00. Diameter: 32 mm. Height: 160 mm.
2005.40
2005.30
2005.40 Drop weight 1 kg, height 160 mm
2005.50 Drop weight 0.5 kg, height 82 mm
2005.60 Drop weight 0.25 kg, height 42 mm
2005.80
Timer tape holder
Holder for timer tape 2005.20. Made of black plastic with ball
bearings and a 10 mm diameter mounting rod and bracket of
stainless steel.
2005.80 Timer tape holder
science
®
70
mechanics
Oscillating motion
Prytz’ oscillator
The apparatus is used to demonstrate Hooke’s law and to
study the harmonic motion of a linear oscillator. By the use of a
double spring, energy loss due to rotational motion is avoided.
The scale is provided with a mirror to help eliminate parallax
errors when making readings.
Four weights are included: 10, 20 50 and 100 g which can be
combined with one of three different sets of springs.
The device is mounted on a standard Ø 10 mm retort stand
(not included).
Mathematical pendulum
An ideal mathematical pendulum consists of a point mass,
suspended in e mass-less, inelastic cord. In this case, the
pendulum’s period is determined by its length and the local
gravitational acceleration.
This device is a fairly good approximation to the ideal. The
apparatus consists of two lens-shaped weights of different
material but with the same physical dimensions, so that they
have different masses but the same air resistance profile. Also
supplied is a rod with hooks for two-point suspension and a
pendulum cord.
2182.10 Mathematical pendulum
2180.00 Prytz’ oscillator
Recommended for use with 2180.00 and 2182.10:
0006.00 Retort stand base
0008.40 Retort stand rod
For 2182.10 you may also need:
0023.10 Universal boss head
0027.00 Suspension hook
2182.10
2180.00
®
science
71
mechanics
Steel ball with eyelet
Suited for use as a pendulum bob. Made of
polished, hardened steel with an aluminium eyelet.
2160.00 Steel ball with eyelet, Ø 28 mm, 96 g
2160.10 Steel ball with eyelet, Ø 20 mm, 33 g
Pendulum bob
2160.00
Weights for experiments with pendulum oscillations, determinations of periods and frequencies of
oscillation, energy conservation experiments, etc.
Dimensions: 18 mm diameter, overall length 43 mm.
The weight can be supplied in brass or aluminum
with the same physical dimensions but with different masses.
2160.10
2177.00
2165.00
2165.00 Pendulum bob, brass
2165.10 Pendulum bob, aluminum
Slotted weights with holder
These weights are used for loading of springs or
as pendulum weights. The mass can be changed
25 g at a time. The weights are manufactured of
nickel plated brass with a slot and a centre hole
which prevents the weights from falling off the holder.
Supplied with three weights of 50 g and one weight
of 25 g. Overall weight including holder: 200 g.
2177.10
2177.00 Slotted Weights with holder
Slotted weights with holder
The weights are manufactured of brass with engraved mass
and a centre hole which prevents the weights from falling off
the holder.
The set contains 1 ea. 50 g, 9 ea. 20 g, 1 ea 10. g and 2 ea. 5 g
2177.10 Slotted weights with holder
Coil springs
Product no.
Diameter LengthSpring contant
2155.10
2155.20
2155.30
2155.40
2155.50
11 mm
11 mm
11 mm
31 mm
27 mm
32 mm
74 mm
115 mm
33 mm
155 mm
2155.40
ca. 8.4 N/m
ca. 3.2 N/m
ca. 2.1 N/m
ca. 5.0 N/m
ca. 4.7 N/m
2155.50
2155.10-.30
Set of 5 springs with hook
Set of five springs of equal length but with various spring
constant. With eyelet, position indicator and hook.
2155.80 Set of 5 springs with hook
2155.80
science
®
72
mechanics
Rotation
Motor / generator
This is a universal low voltage motor which also works as a
generator. The dual functionality of this device makes it an
obvious choice for introducing the concepts of conversion of
energy from electric to mechanical form and vice versa.
Also useful for operating units such as strobe discs, colour
discs, and more.
Provided with a sturdy DC motor with a permanent magnet
stator. A two step drive belt shaft is supplied along with a cylindrical winding axle with diameters of 8 and 12 mm. Supplied
with a Ø 10 x 35 mm mounting rod.
Total length: 225 mm
Width: 40 mm
Height: 40 mm
Operating voltage range 0-12 V DC
Rotational speed 0-4800 rpm
5010.00
2025.00
2025.00 Motor/generator
Drive belt set
2037.00
Four different flexible, black synthetic rubber drive belts.
Belt lengths: 240, 289 and 780 mm. The drive belts are oil
resistant.
2037.00 Drive belt set, 4 different belts
Uniform circular motion
Gear motor
A strong, stable motor for low RPMs. The motor is
provided with the same universal spindle and pulley as
2025.00 but with its 21:1 gear ratio and a rated speed
of 80 RPM it is superior for experiments where a slow,
steady rotation is needed.
2025.50
2025.50 Gear motor
Conical pendulum
2025.50
The conical pendulum is a classic example of
uniform circular motion. The Frederiksen
version makes precision measurements easier
to perform – without the usual risks of having
your eye in the plan of the rotation of the bob.
Excellent for teaching topics like circular motion,
centripetal force, combination of forces and more.
The conical pendulum is used with the 2025.50
gear motor. It mounts directly on the thread of the
gear motor’s spindle.
2070.10
The equipment comprises:
• Centre mount and dial with ball bearing
• Three different lengths of strong, inelastic thread with hooks
• Aluminium bob with centre of mass marking
(Gear motor 2025.50 and stand material is not included.)
2070.10 Conical pendulum for 2025.50
®
science
mechanics
73
Prandtl’s rotating disc
For demonstrating the conservation of angular momentum.
A 480 mm diameter metal disc with ball-bearing axle on base
with levelling screws and supporting stool.
Height 150 mm.
Weight: 9.5 kg.
2135.00 Prandtl’s rotating disc
2136.00
2135.00
2070.00
Bicycle wheel gyro
Suitable for demonstrating the conservation of angular momentum, used with a rotating stool or disc. A Ø 500 mm wheel
with plastic lined rim, axle and 2 handles. Supplied with pulley
and 1.5 m nylon cord.
2136.00 Bicycle wheel gyro
1920.10
Double cone with ramp
In contrast to what you expect, the double cone appears to roll
uphill when placed at the bottom of the ramp. But is this also
the case? Stimulate your students’ curiosity with this simple,
classical paradox - and try it with your colleagues in the teachers’ lounge!
1920.10 Double cone with ramp
science
®
74
mechanics
Stroboscope disc
Made of black-lacquered plastic with 1 aperture.
For use with e.g. motor 2025.00 and a suitable lamp (e.g. our
2800.50 Experimental lamp).
Diameter 170 mm, hole diameter 8 mm.
2020.00
2020.00 Stroboscope disc
Stroboscope disc
As 2020.00 but with 12 apertures.
2020.10 Stroboscope disc
Stroboscope
A versatile instrument employing a high intensity xenon flash
tube which gives a brilliant white light, particularly suitable for
photographic purposes.
With the stroboscope and a camera, free fall, projectile trajectories etc. can be analysed.
Harmonic motion like standing waves on a string can be “frozen” or made to move in slow motion.
Another standard application of the stroboscope is determining rotational speeds.
The flash rate can be regulated from 1 to 300 flashes per
second corresponding to 60 to 18,000 rpm.
Digital reading with switch for impulses per second, rpm. and
external triggering. Input terminals for external triggering and
output terminals for internal trigger signal.
Mains power supply: 220 V AC/50-60 Hz. Equipped with a
threaded hole in the bottom that fits standard photo tripods.
Dimensions: (W x H x D) 180 x 240 x 120 mm
2020.10
2015.60 Stroboscope
2015.60
®
science