Question 1

A 7.0-kg object is acted on by two forces.One of the forces is 10.0 N acting toward the east.Which of the following forces is the other force if the acceleration of the object is  toward the east?

Accepted Answer

A)   6.0 N east
B)   3.0 N west
C)   12 N east
D)   9.0 N west
E)   7.0 N westF) C) and E)
G) C) and D)

Question 2

A dog is standing in the bed of a pickup truck.The bed is coated with ice,causing the force of friction between the dog and the truck to be zero.The truck is initially at rest,and then accelerates to the right,moving along a flat road.As seen from a stationary observer (watching the truck move to the right) ,the dog

Accepted Answer

A)   does not move left or right, but the back of the truck moves towards the dog.
B)   moves to the right, but not as quickly as the truck is moving to the right, causing it to slide towards the back of the truck.
C)   moves to the right at the same rate as the truck, so it doesn't slide.
D)   moves to the left, as the truck moves to the right, causing the dog to slide towards the back of the truck.E) A) and B)
F) A) and C)

Question 3

You are standing in a moving bus,facing forward,and you suddenly fall forward as the bus comes to an immediate stop.The force acting on you that causes you to fall forward is

Accepted Answer

A)   the force of gravity.
B)   the normal force due to your contact with the floor of the bus.
C)   the force due to static friction between you and the floor of the bus.
D)   the force due to kinetic friction between you and the floor of the bus.
E)   No forces were acting on you to cause you to fall.F) B) and E)
G) None of the above

Question 4

A stalled car is being pushed up a hill at constant velocity by three people.The net force on the car is

Accepted Answer

A)   zero.
B)   up the hill and equal to the weight of the car.
C)   down the hill and equal to the weight of the car.
D)   up the hill and greater than the weight of the car.
E)   down the hill and greater than the weight of the car.F) A) and D)
G) B) and D)

Exam 4: Newtons Laws of Motion

A stalled car is being pushed up a hill at constant velocity by three people.The net force on the car is

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You are standing in a moving bus,facing forward,and you suddenly fall forward as the bus comes to an immediate stop.The force acting on you that causes you to fall forward is

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A 7.0-kg object is acted on by two forces.One of the forces is 10.0 N acting toward the east.Which of the following forces is the other force if the acceleration of the object is toward the east?

Correct Answer
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Exam 4: Newtons Laws of Motion

A stalled car is being pushed up a hill at constant velocity by three people.The net force on the car is

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You are standing in a moving bus,facing forward,and you suddenly fall forward as the bus comes to an immediate stop.The force acting on you that causes you to fall forward is

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A 7.0-kg object is acted on by two forces.One of the forces is 10.0 N acting toward the east.Which of the following forces is the other force if the acceleration of the object is toward the east?

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Correct Answer
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