Torque and Simple Machines
Name:
1.
In the diagram, 55 joules of work is needed to raise a 10-newton 5.0 meters. How much work is done to overcome
friction as the weight is raised?
A.
2.
5.5 J
C.
11 J
D. 50 J
newton
meter3
kilogram meter3
B.
C.
watt2 newton
D.
kilogram meter2
second2
10 J
B.
60 J
C.
80 J
D. 100 J
A jack exerts a force of 4,500 newtons to raise a car 0.25 meter. What is the approximate work done by the jack?
A.
5.
B.
A 20-newton block is at rest at the bottom of a frictionless incline as shown in the diagram. How much work
must be done against gravity to move the block to the top of the incline?
A.
4.
5J
One joule is equivalent to one
A.
3.
Date:
5:6
10
5J
B.
1:1
103 J
C.
4:5
103 J
D. 1:8
104 J
As shown in the diagram, pulling a 9.8-newton cart a distance of 0.50 meter along a plane inclined at 15 requires
1.3 joules of work. If the cart were raised 0.50 meter vertically instead of being pulled along the inclined plane,
the amount of work would be
A.
less
B.
greater
C.
page 1
the same
6.
The accompanying diagram shows two identical wooden planks, A and B, at di erent incline angles, used to slide
concrete blocks from a truck.
Compared to the amount of work done against friction by a block sliding down plank A, the work done against
friction by a block sliding down plank B is
A.
7.
less
B.
more
C.
the same
A block weighing 15 newtons is pulled to the top of an incline that is 0.20 meter above the ground, as shown.
If 4.0 joules of work are needed to pull the block the full length of the incline, how much work is done against
friction?
A.
8.
1.0 J
B.
0.0 J
C.
3.0 J
D. 7.0 J
Jonas needs to split a log. He has a sledge hammer. What other tool should he also use to split the log?
A.
a lever
B.
a pulley
C.
page 2
a wedge
D. a fulcrum
Torque and Simple Machines
9.
The picture shows a ladder leaning against a wall.
A person climbing this ladder is using the ladder as
A.
10.
a lever.
B.
a wedge.
C.
a simple gear.
D. an inclined plane.
The picture below shows a seesaw.
A seesaw on a playground is an example of what type of simple machine?
A.
11.
lever
B.
screw
C.
wedge
D. wheel and axle
The picture below shows an antique piano stool.
This piano stool uses what type of simple machine to adjust the height?
A.
wedge
B.
screw
C.
page 3
pulley
D. lever
Torque and Simple Machines
12.
Alexa wants to build a machine for her technology class. To think of ideas, she drew four sketches of moving
parts for her machine. Which design will work?
A.
B.
C.
D.
13.
The lever shown above can be used to move the bowling ball o the shelf. Pushing down at what point on the
lever would require you to apply the least amount of force to move the ball?
A.
1
B.
2
C.
page 4
3
D. 4
Torque and Simple Machines
Problem-Attic format version 4.4.202
c 2011–2013 EducAide Software
_
Licensed for use by Mark Williams
Terms of Use at www.problem-attic.com
Torque and Simple Machines
1.
Answer:
A
2.
Answer:
D
3.
Answer:
B
4.
Answer:
B
5.
Answer:
B
6.
Answer:
B
7.
Answer:
A
8.
Answer:
C
9.
Answer:
D
10.
Answer:
A
11.
Answer:
B
12.
Answer:
A
13.
Answer:
A
03/12/2014