Download Forces Practice Questions 1. A push or pull is called a. motion b

Forces Practice Questions
1. A push or pull is called
a. motion
b. force
c. acceleration
d. velocity
2. James combines all the forces acting on a tennis
ball. He is finding the
a. net force
b. inertia force
c. gravitational force
d. frictional force
3. Janet is sliding a box across the floor. What
does she need to know to calculate the force on
the box?
a. mass and inertia
b. acceleration and friction
c. mass and acceleration
d. friction and gravity
4. Inertia is the resistance of an object to a change
in its
a. gravity
b. motion
c. mass
d. balanced force
5. A soccer player kicks a ball that is at rest. What
do you predict will happen?
a. The ball will not move.
b. The ball will lose momentum.
c. The ball will accelerate in the direction opposite
the applied force.
d. The ball will accelerate in the same direction as
the applied force.
APTER 2
Forces
6. According to Newton’s second law of motion,
force equals mass times.
a. velocity
b. momentum
c. acceleration
d. mass
7. When you push on a door, the door pushes
back with an equal and opposite force.
These two forces are known as
a. mass and velocity force pairs
b. unbalanced force pairs
c. mass and acceleration force pairs
d. action/reaction force pairs
8. The momentum of an object is the product of
its
a. mass and acceleration
b. mass and velocity
c. force and mass
d. net force and mass
9. A bowling ball rolls down the lane and hits
some pins before rolling off the lane. What
happens to the momentum of the ball as it hits
the pins?
a. Some of the ball’s momentum is transferred to
the pins.
b. All of the ball’s momentum is transferred to the
pins.
c. None of the ball’s momentum is transferred to
the pins.
d. The pins stop the ball from rolling farther.
10. Conservation of momentum occurs only when
there are
a. no outside forces
b. balanced and unbalanced force pairs
c. gravity and friction
d. mass and inertia
CHAPTER 2
11. Which of the following is an example of zero
net force applied to an object?
a. a skier moving down a mountain with increasing
speed
b. a car turning left without changing speed
c. a ball being hit into the outfield with a bat
d. a rope pulled equally from opposite ends
12. A skater is moving at a constant speed. How
can he increase his speed?
a. drag the heel stop to increase friction
b. lean to one side, causing the skates to turn
c. reduce the force with which he pushes his feet
against the ground
d. increase the force with which he pushes his feet
against the ground
13. If one force is balanced by another force, the
a. effect is the same as no force at all
b. effect is a positive net force
c. size of the first force is balanced by the direction
of the second force
d. direction of the first force is balanced by the size
of the second force
14. Newton’s first law describes the tendency of
objects to resist a change in motion. This
resistance is also called
a. inertia
b. net force
c. friction
d. gravity
15. One way to decrease acceleration is to
a. decrease force and mass equally
b. increase force more than mass
c. increase mass
d. decrease mass
HAPTER 2
orces
16. When a soccer ball is kicked, the action and
reaction forces do not cancel each other out
because the
a. force of the foot on the ball is greater than the
force of the ball on the foot
b. force of the ball on the foot is greater than the
force of the foot on the ball
c. forces act at different times
d. forces act on two different objects
17. A mover exerts a force on a piano. The piano
exerts a force back. Together, these forces are
known as a(n)
a. action/reaction force pair
b. friction/gravity force pair
c. contact force/inertia pair
d. balanced/unbalanced force pair
18. Centripetal force keeps an object moving in a
circle. This force points
a. toward the center of the circle
b. toward the outer edge of the circle
c. to the right of the center of the circle
d. away from the circle in all directions
19. If two objects in a collision receive equal and
opposite forces for the same length of time, the
total momentum
a. stays the same
b. increases
c. decreases
d. is zero
20. Conservation of momentum occurs only when
a. the only forces acting on objects
reaction/reaction pairs
b. the mass and acceleration of an object both
change
c. the momentum of each colliding object remains
the same
d. balanced forces act on objects
21. Which has the greatest inertia?
a. a baseball traveling at 95 mi/h
b. a car sitting at a traffic light
c. a jumbo jet airplane taxiing down a runway
d. a cart loaded with large books
22. A bicyclist is riding in a straight line at a
constant speed. Which best describes the forces
acting on the bike?
a. The forces are unbalanced.
b. The forces are balanced.
c. A positive net force is acting on the bike.
d. A negative net force is acting on the bike.
23. The motion of an object can be changed by
a(n)
a. unbalanced force
b. balanced force
c. net force equal to zero
d. large velocity
24. Newton’s first law describes the tendency of
objects to resist a change in motion.This
resistance is also called
a. inertia
b. velocity
c. acceleration
d. friction
2 5. Imagine that each of the following balls is
moving at the same velocity. Which ball has the
most momentum?
a. golf ball
b. tennis ball
c. soccer ball
d. bowling ball
APTER 2
Forces
26. The strength of a reaction force is
a. greater than the strength of the action force
b. less than the strength of the action force
c. equal to the strength of the action force
d. unrelated to the strength of the action force
27. The action force of a golf club hitting a ball
accelerates the ball in one direction. Predict the
direction in which the reaction force accelerates
the club.
a. in the opposite direction
b. in the same direction
c. at right angles to the action force
d. upward away from the action force
28. You are standing in a crowded city bus. As the
bus begins to move forward, you have a tendency
to fall backward. Which of the following best
explains this motion?
a. When the bus is still, both you and the bus are at
rest. As the bus moves forward,
you stay at rest, resulting in a tendency to fall
backward.
b. Your lesser mass causes you to be moved more
easily. Thus, the force of the bus
on you moves you backward.
c. The motion is a result of action/reaction pairs.
The forward motion of the bus
causes an equal and opposite reaction of your body
falling backward.
d. The motion is a result of balanced forces. The
motion of the bus forward balances
a backward force on you.
29. How do you find the total momentum of two
objects moving at the same speed in opposite
directions?
a. Add the momentum of the two objects.
b. Subtract the momentum of one object from the
other object.
c. Multiply the momentum of the two objects.
d. Divide the momentum of the larger object by
that of the smaller.
30. The momentum of a skateboard is not
conserved because
a. friction acts on the wheels of the skateboard
b. centripetal force acts against the motion of the
skateboard
c. inertia exceeds the motion of the skateboard
d. the skateboard tends to move sideways