Question 1

If less horizontal force is applied to a sliding object than is needed to maintain a constant velocity

Accepted Answer

A) the object accelerates in the direction of the applied force. 
B) the friction force increases. 
C) the object eventually slides to a stop. 
D) none of the above 
A) the object accelerates in the direction of the applied force. 
B) the friction force increases. 
C) the object eventually slides to a stop. 
D) none of the above

Question 2

The mass of a pet turtle that weighs 10 N is

Accepted Answer

A) about 1 kg. 
B) about 10 kg. 
C) about 100 kg. 
D) about 1000 kg. 
E) none of these 
A) about 1 kg. 
B) about 10 kg. 
C) about 100 kg. 
D) about 1000 kg. 
E) none of these

Question 3

A car has a mass of 1000 kg and accelerates at 2 meters per second per second.What is the magnitude of the net force exerted on the car?

Accepted Answer

A) 500 N 
B) 1000 N 
C) 1500 N 
D) 2000 N 
E) none of these 
A) 500 N 
B) 1000 N 
C) 1500 N 
D) 2000 N 
E) none of these

Question 4

Whenever the net force on an object is zero,its acceleration

Accepted Answer

A) may be less than zero. 
B) is zero. 
C) may be more than zero 
A) may be less than zero. 
B) is zero. 
C) may be more than zero

Question 5

An object is propelled along a straight-line path by a force.If the net force were doubled,the object's acceleration would be

Accepted Answer

A) half as much. 
B) the same. 
C) twice as much. 
D) four times as much. 
E) none of these 
A) half as much. 
B) the same. 
C) twice as much. 
D) four times as much. 
E) none of these

Question 6

A tow truck exerts a force of 3000 N on a car,accelerating it at 2 meters per second per second.What is the mass of the car?

Accepted Answer

A) 500 kg 
B) 1000 kg 
C) 1500 kg 
D) 3000 kg 
E) none of these 
A) 500 kg 
B) 1000 kg 
C) 1500 kg 
D) 3000 kg 
E) none of these

Question 7

Two tennis balls fall through the air from a tall building.One of them is filled with lead pellets.The ball to reach the ground first is the

Accepted Answer

A) regular ball. 
B) lead-filled ball. 
C) same for both 
A) regular ball. 
B) lead-filled ball. 
C) same for both

Question 8

Hang from a pair of gym rings and the upward support forces of the rings will always

Accepted Answer

A) each be half your weight. 
B) each be equal to your weight. 
C) add up to equal your weight. 
A) each be half your weight. 
B) each be equal to your weight. 
C) add up to equal your weight.

Question 9

A skydiver,who weighs 500 N,reaches terminal velocity of 90 km/h.The air resistance on the diver is then

Accepted Answer

A) 90 N. 
B) 250 N. 
C) 410 N. 
D) 500 N. 
E) none of these 
A) 90 N. 
B) 250 N. 
C) 410 N. 
D) 500 N. 
E) none of these

Question 10

A 1-kg ball is thrown at 10 m/s straight upward.Neglecting air resistance,the net force that acts on the stone when it is halfway to the top of its path is about

Accepted Answer

A) 1/2 N. 
B) 1 N. 
C) 5 N. 
D) 7)5 N. 
E) 10 N. 
A) 1/2 N. 
B) 1 N. 
C) 5 N. 
D) 7)5 N. 
E) 10 N.

Question 11

Compared to a 1-kg block of solid iron,a 2-kg block of solid iron has the same

Accepted Answer

A) mass. 
B) volume. 
C) weight. 
D) all of these 
E) none of these 
A) mass. 
B) volume. 
C) weight. 
D) all of these 
E) none of these

Exam 4: Newtons Second Law of Motion: Force and Acceleration

If less horizontal force is applied to a sliding object than is needed to maintain a constant velocity

The mass of a pet turtle that weighs 10 N is

A car has a mass of 1000 kg and accelerates at 2 meters per second per second.What is the magnitude of the net force exerted on the car?

Whenever the net force on an object is zero,its acceleration

An object is propelled along a straight-line path by a force.If the net force were doubled,the object's acceleration would be

A tow truck exerts a force of 3000 N on a car,accelerating it at 2 meters per second per second.What is the mass of the car?

Two tennis balls fall through the air from a tall building.One of them is filled with lead pellets.The ball to reach the ground first is the

Hang from a pair of gym rings and the upward support forces of the rings will always

A skydiver,who weighs 500 N,reaches terminal velocity of 90 km/h.The air resistance on the diver is then

A 1-kg ball is thrown at 10 m/s straight upward.Neglecting air resistance,the net force that acts on the stone when it is halfway to the top of its path is about

Compared to a 1-kg block of solid iron,a 2-kg block of solid iron has the same

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