Download Multiple Choice: Motion and Forces Name: Core: ___ Date: ___1

Multiple Choice: Motion and Forces
Name: _____________________
___1. Which of Newton’s laws best explains why
motorists should buckle up?
A) The first law
B) The second law
C) The third law
D) Law of gravity
___2. When you sit in a chair, the net force acting on
you is __.
A) zero
B) up
C) down
D) depending on your weight
___3. In the absence of an external force, a moving
object will __.
A)
B)
C)
D)
stop immediately
go faster and faster
slowly slow down, and then stop
move with constant speed
___4. When the rocket engines on a spacehip are
suddenly turned off the spaceship will ___.
A)
B)
C)
D)
stop immediately
go faster and faster
slowly slow down, and then stop
move with constant speed
___5. A rocket moves through empty space in a straight
line with constant speed. It is far from the gravitational
effect of any star or planet. Under these conditions, the
force that must be applied to the rocket in order to
sustain its motion is ___.
A)
B)
C)
D)
Equal to its weight
Equal to its mass
Dependent on how fast it is moving
Zero
___6. You are standing in a moving bus, facing forward,
and you suddenly fall forward. You can imply from this
that the bus’s __.
A)
B)
C)
D)
Velocity decreased
Velocity increased
Speed remained the same, but it’s turning right.
Speed remained the same, but it’s turning left.
Core: ___
Date: ______________
___7. A net force (F) accelerates a mass (m) with an
acceleration (a). If the same net force suddenly doubled,
then the acceleration will be ___.
A)
B)
C)
D)
Four times as fast
Two times as fast
Half as fast
One quarter as fast
___8. A net force (F) acts on a mass (m) and produces
an acceleration (a). What acceleration results if the net
force doubles and the mass is four times as big?
A)
B)
C)
D)
Half the acceleration
Eight times the acceleration
Four times the acceleration
Twice the acceleration
___9. Action-reaction forces are ___.
A) equal in magnitude and point in the same
direction.
B) equal in magnitude, but point in opposite
directions.
C) unequal in magnitude, but point in the same
direction.
D) unequal in magnitude and point in opposite
directions.
___10. An object of mass (m) sits on a flat table. The
Earth pulls on this object with a force (mg), which we
will call the action force. What is the reaction force?
A) The table pushing up on the object with force
mg.
B) The object pushing down on the table with
force mg.
C) The table pushing down on the floor with force
mg.
D) The object pulling upward on the Earth with
force mg.
___11. The acceleration due to gravity is lower on the
Moon than on Earth. Which of the following is true
about the mass and weight of an astronaut on the
Moon’s surface compared to Earth?
A) Mass is less on the moon, but weight is the
same.
B) Both mass and weight are less on the Moon.
C) Mass is the same on the Moon, but weight is
less.
D) Both mass and weight are the same on the
Moon.
___12. If a baseball and a cannonball are dropped from
the same height at the same time, which ball will hit the
ground first?
A)
B)
C)
D)
The cannonball will hit first.
The baseball will hit first.
The balls land at the same time.
The ball with the larger volume hits first.
___13. If an action force is a cue ball (white) hitting a
billiard ball (various colors) when playing pool, then the
reaction force is ___.
A)
B)
C)
D)
exerted on the table
exerted on all the other billiard balls
not present
exerted by the billiard ball on the cue ball
___14. A crumpled piece of paper hits the ground
before a flat sheet of paper because __.
A) the acceleration of gravity is greater on the
crumpled paper
B) there is more air resistance on the flat paper
C) the crumpled paper is more massive
D) the crumpled paper is less massive
___15. An ice skater at rest pushes against a sled at rest,
causing both the skater and sled to move away from
each other with different accelerations. This is an
example best described by ___.
A) Newton’s first law of motion for objects at rest
B) Newton’s first law of motion for objects in
motion
C) Newton’s second law of motion
D) Newton’s third law of motion
___16. A sled sliding on a flat, icy surface with a
constant velocity is best described by ___.
A) Newton’s first law of motion for objects at rest
B) Newton’s first law of motion for objects in
motion
C) Newton’s second law of motion
D) Newton’s third law of motion
___17. Which of the following explains the difference
between speed and velocity?
A)
B)
C)
D)
One has motion and the other does not.
One has direction and the other does not.
One involves time and the other does not.
One involves acceleration and the other does
not.
___18. Acceleration is defined as the change in ___.
A)
B)
C)
D)
time it takes to move from one place to another.
velocity of an object.
distance divided the time interval.
time it takes to move from one speed to
another speed.
___19. A ball is thrown straight up. At the top of its path
its instantaneous speed is ___.
A)
B)
C)
D)
0 m/s
About 5 m/s
About 10 m/s
About 20 m/s
___20. The tendency of an object to resist its change in
motion is called ___.
A)
B)
C)
D)
Displacement
Distance
Inertia
Velocity