Question 1

A light woman and a heavy man jump from an airplane at the same time and open their same-size parachutes at the same time.Which person reaches a state of zero acceleration first?

Accepted Answer

A) the light woman 
B) the heavy man 
C) both at the same time 
D) not enough information

Question 2

A Mack truck and a Mini Cooper traveling at the same speed collide head-on.The vehicle to undergo the greatest change in velocity will be the

Accepted Answer

A) Mini Cooper. 
B) Mack truck. 
C) same

Question 3

A heavy object and a light object in a vacuum are dropped at the same time from rest.The heavy object reaches the ground

Accepted Answer

A) sooner than the light object. 
B) at the same time as the light object. 
C) later than the light object.

Question 4

Action and reaction pairs of forces always act on

Accepted Answer

A) the same body. 
B) different bodies. 
C) either of these 
D) none of the above

Question 5

Newton's second law focuses on

Accepted Answer

A) speed. 
B) velocity. 
C) acceleration. 
D) none of the above

Question 6

If the mass of an object does not change,a constant net force on the object produces constant

Accepted Answer

A) velocity. 
B) acceleration. 
C) both of these 
D) none of the above

Question 7

While a car travels around a circular track at constant speed,its

Accepted Answer

A) acceleration is zero. 
B) velocity is zero. 
C) both of these 
D) none of the above

Question 8

As drops fall from a leaky faucet they become

Accepted Answer

A) closer together as they fall. 
B) farther apart as they fall. 
C) a fixed distance apart as they fall. 
D) none of the above

Question 9

The air resistance of falling is greatly affected by an object's frontal area and

Accepted Answer

A) mass. 
B) weight. 
C) speed.

Question 10

A skydiver jumps from a high-flying plane.As her velocity of fall increases,her acceleration

Accepted Answer

A) increases. 
B) decreases. 
C) remains unchanged regardless of air resistance.

Question 11

When an object falls through the air,as velocity increases the net force

Accepted Answer

A) increases. 
B) decreases. 
C) remains the same whether in air or in a vacuum.

Question 12

A pair of tennis balls fall through the air from a tall building.One ball is regular and the other is filled with lead pellets.Air resistance just before they hit is greater for the

Accepted Answer

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

Question 13

A pair of tennis balls fall through the air from a tall building.One ball is regular and the other 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

Question 14

A constant net force on a railroad car produces constant

Accepted Answer

A) velocity. 
B) acceleration. 
C) both of these 
D) neither of these

Question 15

If you jump vertically while inside a fast-moving train that is slowing down,you land

Accepted Answer

A) a bit ahead of your original position. 
B) at your original position. 
C) a bit behind your original position.

Question 16

Jake pulls on a 25-kg cart with a constant force of 50 N.What is the wagon's acceleration?

Accepted Answer

A) 0.2 m/s2 
B) 2.0 m/s2 
C) 5 m/s2 
D) 20 m/s2 
E) 200 m/s2

Question 17

A space probe in remote outer space continues moving

Accepted Answer

A) because some kind of force acts on it. 
B) in a curved path. 
C) even though no force acts on it. 
D) due to gravity.

Question 18

A block is dragged at constant velocity across a level surface by a force of 6 N.What is the force of friction between the block and the surface?

Accepted Answer

A) less than 6 N 
B) more than 6 N 
C) 6 N 
D) not enough information

Question 19

Which object has zero acceleration?

Accepted Answer

A) one at rest 
B) one moving at constant velocity 
C) one in mechanical equilibrium 
D) all of the above 
E) none of the above

Question 20

The attraction of a person's body toward Earth is called weight.The reaction to this force is

Accepted Answer

A) the person's body pushing against Earth's surface. 
B) Earth's surface pushing against the person's body. 
C) the person's body pulling on Earth. 
D) none of the above

Exam 2: Newtons Laws of Motion