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- 1. Multiple Choice
An action exerted on an object which may change the object’s state of rest or motion defines
acceleration
force
mass
velocity
- 2. Multiple Choice
Units that measure weight are units of
acceleration
force
mass
velocity
- 3. Multiple Choice
A force unit is defined as the product of a mass unit and a unit of:
time
displacement
velocity
acceleration
- 4. Multiple Choice
Which of the following statements describe force diagrams? I. Force diagrams show force vectors as arrows.
II. Forces exerted on the object are represented.
III. Forces exerted by the object are represented.
I and II
I and III
II and III
I, II, and III
- 5. Multiple Choice
Which of the following statements describe free-body diagrams?
I. Force diagrams show force vectors as arrows.
II. Forces exerted on the object are represented.
III. Forces exerted by the object are represented.
I and II
I and III
II and III
I, II, and III
- 6. Multiple Choice
The gravitational force exerted on an object would most likely be represented by which force vector?
↑
←
↓
→
- 7. Multiple Choice
Which of the following situations describes inertia?
A stationary object tends to resist being moved.
A moving object tends to resist a change in speed.
A moving object tends to resist a change in direction.
all of the above
- 8. Multiple Choice
Which of the following is true of inertia?
It is described in Newton’s first law of motion.
It is a property of motion.
It is measured by weight
all of the above
- 9. Multiple Choice
Two forces act on an object. The magnitude of the net force acting on the object
equals the sum of the magnitudes of the two forces.
equals the difference in the magnitudes of the two forces.
equals the average of the two forces.
cannot be determined from the given information.
- 10. Multiple Choice
An object is at rest on an incline. The component of gravity acting downward and along the incline on the object is described as Fg,x = +8.0 N. Which axis is pointing up the incline?
+x axis
+y axis
-x axis
-y axis
- 11. Multiple Choice
A force of 5 N and a force of 15 N acting on an object can produce the following net forces except
20 N
15 N
10 N
5 N
- 12. Multiple Choice
Two dogs are tugging on a toy. One dog pulls with a horizontal force of 14 N due north. The other is pulling due east with a horizontal force of 14 N. What is the direction of the net external horizontal force on the toy?
north
northeast
west
northwest
- 13. Multiple Choice
Which of the following statements describe an object in equilibrium?
I. The object is at rest.
II. The object is moving at constant velocity.
III. The net external force on the object is zero.
I and II
I and III
II and III
I, II, and III
- 14. Multiple Choice
A single force acting on an object is represented in a free-body diagram of the object by the following force vector: ↑. Which of the following force vectors represents a single force acting on the object that will bring the object into equilibrium?
↑
→
↓
←
- 15. Multiple Choice
A rigid rod holds a restaurant sign horizontally from the side of a building. The force due to gravity acting on the sign is 165 N with the angle between the sign and the rod being 50.0°. Ignoring the weight of the rod, what is the magnitude of the tension in the rod?
165 N
256.7 N
215 N
216 N
- 16. Multiple Choice
The change in the horizontal velocity of a 12-kg scooter is +0.5 m/s. What is the net horizontal force acting on it?
+24 N
+6 N
greater than 0 N
0 N
- 17. Multiple Choice
During a three-part circus stunt, a clown holds a ball. The clown then tosses the ball upward. After releasing it, the ball is caught a few moments later from above by another clown on a trapeze. Which set of data could represent the normal force exerted by the ground on the first clown during the stunt? The force due to gravity on the clown is 680 N and that on the ball is 20 N.
700 N, 695 N, 720 N
700 N, 695 N, 700 N
700 N, 705 N, 700 N
700 N, 705 N, 680 N
- 18. Multiple Choice
In which situation is the net force acting on a car zero?
The car increases speed and changes direction
The car increases speed but does not change direction.
The car maintains its speed but changes direction.
The car maintains both its speed and direction.
- 19. Multiple Choice
A truck and a car uniformly accelerate from rest to a velocity of 3.0 m/s in equal time intervals. The truck is ten times as massive as the car. Which of the following statements is correct?
The acceleration of the truck is 1/10 that of the car.
The truck travels 1/10 the distance of the car.
The force on the truck is 10 times the force on the car.
all of the above
- 20. Multiple Choice
In an action-reaction pair, the:
action force is exerted first.
action force and the reaction force are equal in magnitude and act in the same direction.
action force and the reaction force are contact forces only.
action force and the reaction force act on two different objects.
- 21. Multiple Choice
A batter strikes a baseball with a bat. Identify an action-reaction pair and describe the forces exerted by each.
The batter exerts a force on the bat; the ball exerts a force on the bat.
The batter exerts a force on the bat; the bat exerts a force on the batter.
The bat exerts a force on the batter; the bat exerts a force on the ball.
The ball exerts a force on the bat; the bat exerts a force on the batter.
- 22. Multiple Choice
A child tugs on a rope attached to a 0.62-kg toy with a horizontal force of 16.3 N. A puppy pulls the toy in the opposite direction with a force 15.8 N. What is the acceleration of the toy?
0.8 m/s2
0.12 m/s2
-0.8 m/s2
-0.12 m/s2
- 23. Multiple Choice
A 12.0-kilogram cart is moving at a speed of 0.25 meter per second. After the speed of the cart is tripled, the inertia of the cart will be
unchanged
one-third as great
three times greater
nine times greater
- 24. Multiple Choice
If a block is in equilibrium, the magnitude of the block's acceleration is:
zero
decreasing
increasing
constant, but not zero
- 25. Multiple Choice
When the sum of all the forces acting on a block on an inclined plane is zero, the block:
must be at rest
must be accelerating
may be slowing down
may be moving at constant speed
- 26. Multiple Choice
A 4.0-kilogram object is accelerated at 3.0 meters per second2 north by an unbalanced force. The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at:
12 m/s2
6.0 m/s2
3.0 m/s2
1.5 m/s2
- 27. Multiple Choice
Four forces act concurrently on a block on a horizontal surface as shown in the diagram below.
As a result of these forces, the block:
moves at a constant speed to the right
moves at a constant speed to the left
accelerates to the right
accelerates to the left
- 28. Multiple Choice
A 40.0-kilogram child exerts a 100.-newton force on a 50.0-kilogram object. The magnitude of the force that the object exerts on the child is
0.0 N
80.0 N
100. N
125 N
- 29. Multiple Choice
A 100.-kilogram cart accelerates at 0.50 meter per second squared west as a horse exerts a force of 60. newtons west on the cart. What is the magnitude of the force that the cart exerts on the horse?
10. N
50. N
60. N
100 N
- 30. Multiple Choice
A 65.0-kilogram astronaut weighs 638 newtons at the surface of Earth. What is the mass of the astronaut at the surface of the Moon, where the acceleration due to gravity is 1.62 meters per second squared?
10.7 kg
65.0 kg
105 N
638 N
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