Chapters 4 & 5: Newton’s Second and Third Laws of Motion

Question 1

Which has the greater mass: a) an automobile battery; b) a king-size pillow; c) neither-both have the same.

Answer 1

a) an automobile battery.

Question 2

If one object has twice as much mass as another object, it also has twice as much: a) inertia; b) volume; c) velocity; d) acceleration due to gravity; e) all of these.

Answer 2

a) inertia.

Question 3

Whenever the net force on an object is zero, its acceleration: a) may be less than zero; b) may be more than zero; c) is zero.

Answer 3

c) is zero.

Question 4

A player catches a ball. Consider the action force to be the impact of the ball against the player’s glove. The reaction to this force is the: a) force the glove exerts on the ball; b) player’s grip on the glove; c) muscular effort in the player’s arms; d) none of these.

Answer 4

a) force the glove exerts on the ball.

Question 5

As a ball falls, the action force is the pull of Earth on the ball. The reaction force is the: a) pull of the ball’s mass on the Earth; b) acceleration of the ball; c) air resistance acting against the ball; d) none of these.

Answer 5

a) pull of the ball’s mass on the Earth.

Question 6

The newton is a unit of

Answer 6

force.

Question 7

In which case would you have the largest mass of gold? If your chunk of gold weighed 1 N on the: a) Earth; b) planet Jupiter; c) moon.

Answer 7

c) moon.

Question 8

A rock weighs 30 N on Earth. A second rock weighs 30 N on the moon. Which of the two rocks has the greater mass?

Answer 8

The one on the moon.

Question 9

An object’s weight may properly be expressed in units of

Answer 9

newtons.

Question 10

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) the same; b) twice as much; c) four times as much; d) half as much; e) none of these.

Answer 10

b) twice as much.