Force Test REVIEW

In the absence of an external force, a moving object will

A. Slow down to a stop

B. Go faster and faster

C. Stop immediately

D. Move with constant speed

In the absence of an external force, a moving object will

A. Slow down to a stop

B. Go faster and faster

C. Stop immediately

D. Move with constant speed

An object is thrown straight up. At the top of its path the net force acting on it is

A. Instantaneously equal to zeroB. Greater than zero but less

than its weightC. Equal to its weightD. Greater than its weight

An object is thrown straight up. At the top of its path the net force acting on it is

A. Instantaneously equal to zeroB. Greater than zero but less

than its weightC. Equal to its weightD. Greater than its weight

A camera has a mass of 40 kg on the moon. gmoon = –1.6 m/s2. The weight of the camera on earth is about

A. 7 NB. 40 NC. 65 ND. 240 NE. 400 N

A camera has a mass of 40 kg on the moon. gmoon = –1.6 m/s2. The weight of the camera on earth is about

A. 7 NB. 40 NC. 65 ND. 240 NE. 400 N

A 15-kg wagon is pulled to the right with a force of 45 N. The wagon accelerates to the right at 2 m/s2. How large is the friction force?

A. 3 NB. 15 NC. 30 ND. 45 NE. 60 N

A 15-kg wagon is pulled to the right with a force of 45 N. The wagon accelerates to the right at 2 m/s2. How large is the friction force?

A. 3 NB. 15 NC. 30 ND. 45 NE. 60 N

The coefficient of static friction for steel on ice is 0.1. The force needed to set a 70-kg skater in motion is about

A. 0.1 NB. 0.7 NC. 7 ND. 69 NE. 686 N

The coefficient of static friction for steel on ice is 0.1. The force needed to set a 70-kg skater in motion is about

A. 0.1 NB. 0.7 NC. 7 ND. 69 NE. 686 N

A force just slightly over 40 N is needed to set a 10-kg steel box moving across a wooden floor. The coefficient of static friction is

A. 0.08

B. 0.25

C. 0.4

D. 2.5

A force just slightly over 40 N is needed to set a 10-kg steel box moving across a wooden floor. The coefficient of static friction is

A. 0.08

B. 0.25

C. 0.4

D. 2.5

The inertia of a body tends to cause the body to

A. Speed upB. Slow downC. Resist any change in its motionD. Fall toward the earthE. Decelerate due to friction

The inertia of a body tends to cause the body to

A. Speed upB. Slow downC. Resist any change in its motionD. Fall toward the earthE. Decelerate due to friction

A car moving along a level road at constant velocity has

A. Only weight acting on itB. Only weight and the force of the

engine acting on itC. A net force acting on itD. No net force acting on itE. No force of any kind acting on it

A car moving along a level road at constant velocity has

A. Only weight acting on itB. Only weight and the force of the

engine acting on itC. A net force acting on itD. No net force acting on itE. No force of any kind acting on it

A car is towing a trailer and is accelerating on a level road. The force that the car exerts on the trailer is

A. Equal to the force the trailer exerts on the car

B. Greater than the force the trailer exerts on the car

C. Equal to the force the trailer exerts on the road

D. Equal to the force the road exerts on the trailer

A car is towing a trailer and is accelerating on a level road. The force that the car exerts on the trailer is

A. Equal to the force the trailer exerts on the car

B. Greater than the force the trailer exerts on the car

C. Equal to the force the trailer exerts on the road

D. Equal to the force the road exerts on the trailer

The frictional force between two surfaces in contact does not depend on

A. The normal force pressing one against the other

B. The areas of the surfaces

C. Whether the surfaces are stationary or in relative motion

D. The types of materials in contact

The frictional force between two surfaces in contact does not depend on

A. The normal force pressing one against the other

B. The areas of the surfaces

C. Whether the surfaces are stationary or in relative motion

D. The types of materials in contact

When a net force of 1.0 N acts on a 1.0 N object that is able to move freely, the object receives

A. A speed of 1.0 m/sB. An acceleration of 0.102 m/s2

C. An acceleration of 1.0 m/s2

D. An acceleration of 9.8 m/s2

When a net force of 1.0 N acts on a 1.0 N object that is able to move freely, the object receives

A. A speed of 1.0 m/sB. An acceleration of 0.102 m/s2

C. An acceleration of 1.0 m/s2

D. An acceleration of 9.8 m/s2

A block is pulled at constant speed by a FORCE which acts at an angle. The normal force exerted on the block by the surface is equal to

A. FW

B. FW – Fy

C. FW + Fy

D. FW – F

E. FW + F

F

A block is pulled at constant speed by a FORCE which acts at an angle. The normal force exerted on the block by the surface is equal to

A. FW

B. FW – Fy

C. FW + Fy

D. FW – F

E. FW + F

F

A block is pushed at constant speed by a FORCE which acts at an angle. The normal force exerted on the block by the surface is equal to

A. FW

B. FW – Fy

C. FW + Fy

D. FW – F

E. FW + F

F

A block is pushed at constant speed by a FORCE which acts at an angle. The normal force exerted on the block by the surface is equal to

A. FW

B. FW – Fy

C. FW + Fy

D. FW – F

E. FW + F

F

A force of 1 N is equivalent to

A. 1 kg

B. 1 kg.m/s

C. 1 kg.m/s2

D. 1 kg.m2/s2

A force of 1 N is equivalent to

A. 1 kg

B. 1 kg.m/s

C. 1 kg.m/s2

D. 1 kg.m2/s2

On Earth, Jodi’s mass is 60 kg. If Jodi visited a planet where the acceleration due to gravity is 5.0 m/s2

A. Her mass and weight would both be smaller

B. Her mass and weight would both be largerC. Her mass would stay the same and her

weight would be largerD. Her mass would stay the same and her

weight would be smaller

On Earth, Jodi’s mass is 60 kg. If Jodi visited a planet where the acceleration due to gravity is 5.0 m/s2

A. Her mass and weight would both be smaller

B. Her mass and weight would both be largerC. Her mass would stay the same and her

weight would be largerD. Her mass would stay the same and her

weight would be smaller

Find the acceleration of the 5-kg crate as it slides down the incline (the kinetic coefficient of friction = 0.25)

A. 0.28 m/s2

B. 2.45 m/s2

C. 2.78 m/s2

D. 4.9 m/s2 300

Find the acceleration of the 5-kg crate as it slides down the incline (the kinetic coefficient of friction = 0.25)

A. 0.28 m/s2

B. 2.45 m/s2

C. 2.78 m/s2

D. 4.9 m/s2 300

Find the tension in the rope below:

A. 16 N

B. 18 N

C. 96 N

D. 98 N

2 kg

10 kg

Find the tension in the rope below:

A. 16 N

B. 18 N

C. 96 N

D. 98 N

2 kg

10 kg