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Chapter 02

Motion

 

 

 

True / False Questions

 

1. Galileo reasoned that the distance a freely falling object travels is proportional to the square of the time.

TRUE

 

 

Bloom’s Level: 4. Analyze

Section: 2.05 Topic: Kinematics

 

2. If a 16 lb bowling ball and a 10 lb bowling ball are dropped from the 5^th floor at the same time the heavier ball will reach the ground first.

FALSE

 

 

Bloom’s Level: 4. Analyze

Section: 2.05 Topic: Gravity

 

3. When you roll a ball across the floor, it comes to a stop because you are no longer exerting a force on it.

FALSE

 

 

Bloom’s Level: 4. Analyze

Section: 2.04

Topic: Kinematics

 

4. An object accelerates when its speed or direction changes.

TRUE

 

 

Bloom’s Level: 2. Understand

Section: 2.02

Topic: Kinematics

 

5. A car traveling at 20 mph on a curved exit ramp has a constant velocity.

FALSE

 

 

Bloom’s Level: 3. Apply

Section: 2.02

Topic: Kinematics

 

6. Newton’s 2^nd law states that if a net force acts on an object, it will move at constant velocity.

FALSE

 

 

Bloom’s Level: 3. Apply

Section: 2.06

Topic: Newton’s laws

 

7. For a constant mass the acceleration of an object is directly proportional to the applied force.

TRUE

 

 

Bloom’s Level: 3. Apply

Section: 2.07

Topic: Newton’s laws

 

8. The football team wins a tug of war with the chess team because it pulls harder on the rope than the chess team does.

FALSE

 

 

Bloom’s Level: 3. Apply

Section: 2.06

Topic: Newton’s laws

 

9. The momentum of an object remains the same unless an unbalanced force acts on it.

TRUE

 

 

Bloom’s Level: 3. Apply

Section: 2.08

Topic: Momentum

 

10. A child on a carousel moving at constant speed has an acceleration of zero.

FALSE

 

 

Bloom’s Level: 3. Apply

Section: 2.02

Topic: Newton’s laws

 

Multiple Choice Questions

11. The speed calculated from the distance traveled during an entire trip and the elapsed time
is a(an)
A. average speed.
B. instantaneous speed.
C. final speed.
D. constant speed.
Bloom’s Level: 2. Understand
Section: 2.02
Topic: Kinematics
12. Ignoring air resistance, the velocity of a falling object
A. is constant.
B. is constantly increasing.
C. increases for a while, then becomes constant.
D. depends on the mass of the object.
Bloom’s Level: 3. Apply
Section: 2.05
Topic: Gravity and motion
Chapter 02 – Motion
2-4
13. The difference in speed and velocity is that a measure of velocity must include
A. a destination.
B. distance and time units.
C. direction.
D. time of departure.
Bloom’s Level: 2. Understand
Section: 2.02
Topic: Kinematics
14. The tendency of a moving object to remain in unchanging motion in the absence of an
unbalanced force is called
A. inertia.
B. free fall.
C. acceleration.
D. impulse.
Bloom’s Level: 2. Understand
Section: 2.03
Topic: Newton’s laws
15. Galileo discovered that an object in free fall (ignoring air resistance)
A. falls at constant velocity.
B. has a velocity proportional to its weight.
C. falls with increasing acceleration.
D. None of the above.
Bloom’s Level: 2. Understand
Section: 2.05
Topic: Kinematics
Chapter 02 – Motion
2-5
16. A cannonball is fired straight up at 50 m/s. Neglecting air resistance, when it returns to its
starting point, its speed is
A. 50 m/s.
B. more than 50 m/s.
C. less than 50 m/s.
D. It depends on how long it is in the air.
Bloom’s Level: 4. Analyze
Section: 2.05
Topic: Kinematics
17. A heavy object and a light object are dropped from rest at the same time in a vacuum. The
heavier object will reach the ground
A. before the lighter object.
B. at the same time as the lighter object.
C. after the lighter object.
D. It depends on the shape of the object.
Bloom’s Level: 4. Analyze
Section: 2.05
Topic: Gravity and motion
18. The newton is a unit of
A. motion.
B. energy.
C. power.
D. force.
Bloom’s Level: 4. Analyze
Section: 2.07
Topic: Newton’s laws
Chapter 02 – Motion
2-6
19. The pound is an English unit of measure; its SI counterpart is the
A. newton.
B. kilogram.
C. joule.
D. momentum.
Bloom’s Level: 3. Apply
Section: 2.07
Topic: Newton’s laws
20. If a net force applied to an object doubles, then its
A. velocity doubles.
B. acceleration doubles.
C. acceleration is cut in half.
D. acceleration increases by a factor of four.
Bloom’s Level: 4. Analyze
Section: 2.07
Topic: Kinematics
21. A block of iron is transported to the moon. Which of the following is true?
A. Both the mass and weight remain unchanged.
B. The mass decreases, but the weight remains the same.
C. The mass remains the same, but the weight decreases.
D. Both the mass and weight decrease.
Bloom’s Level: 4. Analyze
Section: 2.07
Topic: Kinematics
Chapter 02 – Motion
2-7
22. A cannon ball and a bowling ball were dropped at the same time from the top of a
building. At the instant before the balls hit the sidewalk, the cannon ball has greater
A. velocity.
B. acceleration.
C. momentum.
D. All of these are the same for the two balls.
Bloom’s Level: 4. Analyze
Section: 2.08
Topic: Kinematics
23. An object moves at a constant 5.0 m/s. One could correctly conclude that
A. no forces are acting on the object.
B. a constant force is applied to the object.
C. it was on a frictionless surface.
D. none of the above.
Bloom’s Level: 4. Analyze
Section: 2.04
Topic: Kinematics
24. The product of the mass (m) and velocity (v) of an object is known as the
A. momentum
B. inertia
C. centripetal force
D. acceleration
Bloom’s Level: 2. Understand
Section: 2.08
Topic: Momentum
Chapter 02 – Motion
2-8
25. From the equation w = mg, it is apparent that weight is equivalent to a(an)
A. force.
B. mass.
C. acceleration.
D. None of these.
Bloom’s Level: 4. Analyze
Section: 2.06
Topic: Newton’s laws
26. Which of the following is not a unit of speed?
A. km/h
B. ft/s
C. m/s
D. g/L
Bloom’s Level: 4. Analyze
Section: 2.02
Topic: Kinematics
27. Which if the following is not a unit of acceleration
A. km/h2
B. m/s
C. km/h/s
D. m/s/s
Bloom’s Level: 4. Analyze
Section: 2.02
Topic: Kinematics
28. An object is moving in a straight line at unchanging speed. This means that
A. all forces on the object are balanced.
B. there is an unbalanced force in the direction of motion.
C. the force of movement is greater than the friction force.
D. the force of movement is greater than the weight of the object.
Bloom’s Level: 4. Analyze
Section: 2.02
Topic: Newton’s laws
Chapter 02 – Motion
2-9
29. Ignoring air resistance, a falling object will have a speed of 9.8 m/s at the end of 1 s and
will fall a distance of
A. 2.5 m.
B. 4.9 m.
C. 9.8 m.
D. 20 m.
Bloom’s Level: 4. Analyze
Section: 2.02
Topic: Gravity and motion
30. Ignoring air resistance, a cannonball shot straight out from a mountain top with a speed of
8 km/s will
A. fall to Earth as a projectile.
B. stay the same distance above the surface.
C. gain altitude as it moves.
D. strike Earth in 9.8 seconds.
Bloom’s Level: 4. Analyze
Section: 2.10
Topic: Gravity and motion
31. An artificial satellite requires no engine because the satellite falls toward Earth as the
surface
A. curves away from it continuously.
B. falls at the same rate as the satellite.
C. is attracted by the Moon.
D. pulls harder on the satellite.
Bloom’s Level: 4. Analyze
Section: 2.10
Topic: Gravity and motion
Chapter 02 – Motion
2-10
32. A straight-line distance covered during a certain amount of time describes an object’s
A. speed.
B. velocity.
C. acceleration.
D. Any of the above.
Bloom’s Level: 2. Understand
Section: 2.02
Topic: Kinematics
33. How fast an object is moving in a particular direction is described by
A. speed.
B. velocity.
C. acceleration.
D. Any of the above.
Bloom’s Level: 2. Understand
Section: 2.02
Topic: Kinematics
34. Acceleration occurs when an object undergoes
A. a speed increase.
B. a speed decrease.
C. a change in the direction of travel.
D. Any of the above.
Bloom’s Level: 2. Understand
Section: 2.02
Topic: Kinematics
Chapter 02 – Motion
2-11
35. A car moving at 60 mi/h comes to a stop in 10 s when the driver slams on the brakes. In
this situation, what does 60 mi/h represent?
A. average speed
B. final speed
C. initial speed
D. constant speed
Bloom’s Level: 4. Analyze
Section: 2.02
Topic: Kinematics
36. Is any change in the motion of an object an acceleration?
A. Yes.
B. No.
C. It depends on the type of change.
Bloom’s Level: 4. Analyze
Section: 2.02
Topic: Kinematics
37. A measure of how fast your speed is changing is a measure of
A. velocity.
B. average speed.
C. acceleration.
D. difference between initial and final speed.
Bloom’s Level: 4. Analyze
Section: 2.02
Topic: Kinematics
38. Neglecting air resistance, a ball in freefall near Earth’s surface will have
A. constant speed and constant acceleration.
B. increasing speed and increasing acceleration.
C. increasing speed and decreasing acceleration.
D. increasing speed and constant acceleration.
Bloom’s Level: 4. Analyze
Section: 2.02
Topic: Gravity and motion
Chapter 02 – Motion
2-12
39. From a bridge a ball is thrown straight up at the same time a ball is thrown straight down
with the same initial speed. Neglecting air resistance, which ball would have a greater speed
when it hits the ground?
A. The one thrown straight up.
B. The one thrown straight down.
C. Both balls would have the same speed.
Bloom’s Level: 4. Analyze
Section: 2.06
Topic: Gravity and motion
40. After being released, a ball thrown straight down from a bridge would have an
acceleration of
A. 9.8 m/s2
.
B. zero.
C. less than 9.8 m/s2
.
D. more than 9.8 m/s2
.
Bloom’s Level: 4. Analyze
Section: 2.06
Topic: Gravity and motion