STAAR REVIEW
Force and Motion Unit
Mighty Mustang Science Dept
Newton’s
Laws
F=ma
Forces
Speed, Velocity
& Acceleration
100
100
100
100
200
200
200
200
300
300
300
300
400
400
400
400
500
500
500
500
B. Force
Which vocabulary word means a
push or pull?
A.Mass
B.Force
C.Acceleration
D.Displacement
Row 1, Col 1
D. Speed
Which vocabulary term means
the rate at which an object
moves?
A. Mass
B. Displacement
C. Velocity
D. Speed
1,2
D Velocity.
Which vocabulary term means the
speed and direction of a moving
object?
A Speed
B Distance
C Acceleration
D Velocity
1,3
B. Inertia
Which vocabulary term means the
tendency to stay at rest or remain in
motion?
A. Speed
B. Inertia
C. Acceleration
D. Newton
1,4
A. Acceleration
Which vocabulary term means the rate at
which speed or direction changes?
A Acceleration
B Speed
C Velocity
D Direction
2,1
D. Friction
Which force resists the motion
between two touching objects?
A. Normal Force
B. Air Resistance
C. Gravity
D. Friction
2,2
D. The direction of motion must be specified for velocity, but
not for speed.
What is the difference between speed of a
moving object and its velocity?
A. The speed of a moving object never changes,
but the velocity can change.
B. The velocity of a moving object never
changes, but the speed can change.
C. The direction of motion must be specified for
speed, but not for velocity.
D. The direction of motion must be specified for
velocity, but not for speed.
2,3
A. The more weight an object hast the more speed the object will have
Time for Helicopter to Fall (sec)
Trial 1
Trial 2
Trial 3
Trial 4
Helicopter
1.19
0.81
0.89
0.90
Helicopter + 1 paperclip
0.72
0.78
0.78
0.80
Helicopter + 2 paperclips
0.69
0.69
0.68
0.60
Helicopter + 3 paperclips
0.45
0.55
0.54
0.52
A student performed an investigation to measure speed. Above are the
results from his investigation. What conclusion can be made about a falling
object?
A. The more weight an object hast the more speed the object will have
B. The more weight an object has the less speed the object will have
C. The less weight an object has the more speed the object will have
D. The less weight an object has the more balanced an object is.
2,4
D 50N to the Left
75N
25N
50N
A sailboat comes with an outboard motor which applies
a force of 75N. A gust of wind applies a force of 25N to
the sailboat. What is the net force and direction of the
movement if the water exerts a force of 50N?
A 150N to the Right
B 150N to the Left
C 50N to the Right
D 50N to the Left
3,1
C. Unbalanced forces cause an object to start moving,
stop moving, or change directions.
What do unbalanced forces do to an object when they
act upon the object?
A. Unbalanced forces cause an object to maintain its
state of motion
B. Unbalanced forces cause the net force of an object
to be zero.
C. Unbalanced forces cause an object to start moving,
stop moving, or change directions.
D. Unbalanced forces cause an object to maintain the
same speed and same direction.
3,2
C. 100 cm/sec north
The positions of the toy cat at three different times are
labeled (1), (2), and (3). What is the velocity of the toy car
at position (2)?
A. 100 cm/sec
B. 100 cm/sec2
C. 100 cm/sec north
D. 100 cm/sec2 north
3,3
C. Third law of motion
A squid moves through the water by ejecting water out of its body
into the surrounding water. When the water is pushed out, the
ejected water pushes back and thrusts the squid forward. Which of
Newton’s laws of motion best applied to a squid’s movement
through water?
A. First law of motion
B. Second law of motion
C. Third law of motion
D. Fourth law of motion
3,4
D. 80N
A 40-kilogram student on an inner tube is pulled by
a boat. The force from the boat results in the student
acceleration at 2 m/s2. The unit for measuring force
is a Newton (N), which is equivalent to 1kgm/s2.
Using Newton’s second law of motion, calculate the
net force needed to cause this acceleration.
A 0.05N
B 20N
C 40N
D 80N
4,1
B. X
At what point should she
let go of the string if she
wants the yo-yo to roll
directly away from her to
her left?
A. W
B. X
C. Y
D. Z
4,2
B. The toy car’s speed has increased between the two
positions
What evidence shows that the toy car has accelerated
between positions (1) and (2)?
A. The toy car has moved.
B. The toy car’s speed has increased between the two
positions
C. The toy car has come to a stop at position (3).
D. The toy car’s direction of motion has changed.
4,3
C. A child and his sister push on a sofa from opposite
sides. They are equally strong, and the sofa does not
move in either direction.
Which example best demonstrates an application of Newton’s
first law of motion?
A. A child tries to push a sofa across the floor, but it will not
move. His sister comes to help him. Pushing together, the
children are able to move the sofa.
B. A child pushes two different sofas across the floor. He find that
the light sofa is easier to push than the heavy sofa.
C. A child and his sister push on a sofa from opposite sides. They
are equally strong, and the sofa does not move in either direction.
D. A child and his sister push two identical sofas across the floor
in a race. His sister is stronger than he, and she wins the race.
4,4
D. Greater than 5.6 pounds.
A string is attached to the front of a skateboard.
Several bricks are placed on top of the
skateboard so that the combined weight of the
skateboard and bricks is 5.6 pounds. How much
force must be applied to the string in order to
move the skateboard forward?
A
B
C
D
Less than 5.6 pounds.
Equal to 5.6 pounds.
Greater than or equal to 5.6 pounds.
Greater than 5.6 pounds.
5,1
B. The unbalanced force caused the sailboat’s motion
to increase from 0m/s to 0.5 m/s
A young boy and his father put a toy sailboat on the surface of a pond. The
boy is disappointed when the boat does not move. The boy gets down on his
knees and blows into the sailboat’s sail. The father observes that the force
from his son’s breath moves the sailboat one meter in two seconds. Which of
the following statements describes how unbalanced forces changed the
sailboats motion?
A. The unbalanced force caused the sailboat’s motion to increase from 0m/s
to 2 m/s
B. The unbalanced force caused the sailboat’s motion to increase from 0m/s
to 0.5 m/s
C. The unbalanced force caused the sailboat’s motion to increase from 0m/s
to 1m/s
D. The unbalanced force caused the sailboat’s motion to decrease from 2m/s
to 0m/s
5,2
A The direction of movement of the children on the Ferris
wheel is constantly changing.
The Ferris wheel is rotating at a
constant speed. Why are the
children riding the Ferris wheel
accelerating?
A The direction of movement of the
children on the Ferris wheel is constantly
changing.
B The Ferris wheel’s speed remains
constant.
C The velocity of the Ferris wheel
remains constant.
D Any object that moves toward the
ground must accelerate.
5,3
C. The skaters will move in the opposite direction from each
other, but the skater with the lesser mass will move faster.
Two skaters are standing on ice facing each other. The mass of one
skater is twice the mass of the other skater. One skater pushes
against the other skater. According to Newton’s second and third
laws of motion, how will the skaters be affected by the push?
A. The skaters will move in the opposite direction from each other,
but the skater with the less mass will move backwards more slowly.
B. The skaters will move in the opposite direction from each other
at the same rate.
C. The skaters will move in the opposite direction from each other,
but the skater with the lesser mass will move faster.
D. The skaters will move in the same direction, but the skater with
the lesser mass will move faster.
5,4