Chapter 6 exam
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. If a baseball and a cannonball are dropped from the same height at the same time, which ball will hit the
ground first?
a. the cannonball c. The balls land at the same time.
b. the baseball d. the ball with the larger volume
____ 2. In what direction is a projectile accelerated?
a. both vertically and horizontally c. vertically upward
b. vertically downward d. horizontally forward
____ 3. Which is a common unbalanced force acting on objects in motion?
a. inertia c. friction
b. acceleration d. speed
____ 4. A car with a mass of 1400 kg moves along the ice with a constant velocity of 18.0 m/s. What is the car’s
momentum?
a. 77.8 N c. 77.8 kg • m/s
b. 25,200 N d. 25,200 kg • m/s
____ 5. When a bowling ball collides with a bowling pin, the momentum of the ball
a. increases slightly as the velocity of the pin increases.
b. decreases slightly as the velocity of the pin increases.
c. decreases slightly as the velocity of the pin decreases.
d. does not change at all.
____ 6. If a moving boxcar gently collides with a boxcar at rest and the two boxcars move together, their combined
momentum will be
a. greater than the original momentum of the moving boxcar.
b. equal to the original momentum of the moving boxcar.
c. less than the original momentum of the moving boxcar.
d. zero.
____ 7. The law of conservation of momentum states that when two objects collide, their combined momentum
a. increases after the collision.
b. remains the same after the collision.
c. decreases after the collision.
d. cannot be determined after the collision.
____ 8. Which of the following is NOT an example of projectile motion?
a. the path of a leaping frog
b. the path of an arrow through the air
c. the path of a crate sliding along flat ground
d. the path of a pitched baseball
____ 9. A 5 kg object has less inertia than an object with the following mass of (1 kg = 1,000 g)
a. 4 kg. c. 2 kg.
b. 6,000 g. d. 1,500 g.
, ____ 10. According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will
a. remain in motion. c. change its momentum.
b. eventually come to a stop. d. accelerate.
____ 11. A cue ball rolls toward a billiard ball with a velocity of 1.0 m/s east. Both balls have identical masses. What
happens to the total momentum after the two balls collide?
a. It is greater than the original momentum of the cue ball.
b. It is equal to the momentum before the collision.
c. It is less than the original momentum of the cueball.
d. It is equal to zero.
____ 12. An ice skater with a mass of 65 kg moves along the ice with a constant velocity of 2.0 m/s. What is the
skater’s momentum?
a. 130 kg • m/s c. 130 N
b. 32 kg • m/s d. 32 N
____ 13. If three balls of steel, rubber, and plastic were dropped at the same time from the same height, which would
hit the ground first? (Assume there is no air resistance.)
a. All would hit at the same time. c. The steel ball would hit first.
b. The rubber ball would hit first. d. The tennis ball would hit first.
____ 14. The mass of which of the following objects (1 kg = 1,000 g) has more inertia than a 5 kg object?
a. 4 kg c. 2 kg
b. 6,000 g d. 1,500 g
____ 15. An astronaut uses a jet of nitrogen to maneuver in space. This can be done because of
a. orbiting. c. momentum conservation.
b. free fall. d. inertia.
____ 16. Why does a crumpled piece of paper land before a flat sheet of paper?
a. Gravity exerts more force on the crumpled paper.
b. There is more air resistance on the flat paper.
c. The crumpled paper is heavier.
d. The crumpled paper is lighter.
____ 17. Why do astronauts in an orbiting spacecraft seem weightless?
a. Nothing produces gravity in space.
b. The astronauts and the ship are in free fall together.
c. The astronauts have no mass in space.
d. Air resistance balances the force of gravity.
____ 18. Why does a ball thrown level to the ground move downward?
a. There is no force on the ball.
b. A force pulls on the ball in the direction it is thrown.
c. Gravity pulls on the ball toward the ground.
d. Forces pull on the ball in both directions.
____ 19. 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.
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. If a baseball and a cannonball are dropped from the same height at the same time, which ball will hit the
ground first?
a. the cannonball c. The balls land at the same time.
b. the baseball d. the ball with the larger volume
____ 2. In what direction is a projectile accelerated?
a. both vertically and horizontally c. vertically upward
b. vertically downward d. horizontally forward
____ 3. Which is a common unbalanced force acting on objects in motion?
a. inertia c. friction
b. acceleration d. speed
____ 4. A car with a mass of 1400 kg moves along the ice with a constant velocity of 18.0 m/s. What is the car’s
momentum?
a. 77.8 N c. 77.8 kg • m/s
b. 25,200 N d. 25,200 kg • m/s
____ 5. When a bowling ball collides with a bowling pin, the momentum of the ball
a. increases slightly as the velocity of the pin increases.
b. decreases slightly as the velocity of the pin increases.
c. decreases slightly as the velocity of the pin decreases.
d. does not change at all.
____ 6. If a moving boxcar gently collides with a boxcar at rest and the two boxcars move together, their combined
momentum will be
a. greater than the original momentum of the moving boxcar.
b. equal to the original momentum of the moving boxcar.
c. less than the original momentum of the moving boxcar.
d. zero.
____ 7. The law of conservation of momentum states that when two objects collide, their combined momentum
a. increases after the collision.
b. remains the same after the collision.
c. decreases after the collision.
d. cannot be determined after the collision.
____ 8. Which of the following is NOT an example of projectile motion?
a. the path of a leaping frog
b. the path of an arrow through the air
c. the path of a crate sliding along flat ground
d. the path of a pitched baseball
____ 9. A 5 kg object has less inertia than an object with the following mass of (1 kg = 1,000 g)
a. 4 kg. c. 2 kg.
b. 6,000 g. d. 1,500 g.
, ____ 10. According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will
a. remain in motion. c. change its momentum.
b. eventually come to a stop. d. accelerate.
____ 11. A cue ball rolls toward a billiard ball with a velocity of 1.0 m/s east. Both balls have identical masses. What
happens to the total momentum after the two balls collide?
a. It is greater than the original momentum of the cue ball.
b. It is equal to the momentum before the collision.
c. It is less than the original momentum of the cueball.
d. It is equal to zero.
____ 12. An ice skater with a mass of 65 kg moves along the ice with a constant velocity of 2.0 m/s. What is the
skater’s momentum?
a. 130 kg • m/s c. 130 N
b. 32 kg • m/s d. 32 N
____ 13. If three balls of steel, rubber, and plastic were dropped at the same time from the same height, which would
hit the ground first? (Assume there is no air resistance.)
a. All would hit at the same time. c. The steel ball would hit first.
b. The rubber ball would hit first. d. The tennis ball would hit first.
____ 14. The mass of which of the following objects (1 kg = 1,000 g) has more inertia than a 5 kg object?
a. 4 kg c. 2 kg
b. 6,000 g d. 1,500 g
____ 15. An astronaut uses a jet of nitrogen to maneuver in space. This can be done because of
a. orbiting. c. momentum conservation.
b. free fall. d. inertia.
____ 16. Why does a crumpled piece of paper land before a flat sheet of paper?
a. Gravity exerts more force on the crumpled paper.
b. There is more air resistance on the flat paper.
c. The crumpled paper is heavier.
d. The crumpled paper is lighter.
____ 17. Why do astronauts in an orbiting spacecraft seem weightless?
a. Nothing produces gravity in space.
b. The astronauts and the ship are in free fall together.
c. The astronauts have no mass in space.
d. Air resistance balances the force of gravity.
____ 18. Why does a ball thrown level to the ground move downward?
a. There is no force on the ball.
b. A force pulls on the ball in the direction it is thrown.
c. Gravity pulls on the ball toward the ground.
d. Forces pull on the ball in both directions.
____ 19. 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.
