Chapter 11

Question 1

Inertia

Answer 1

The tendency of an object to resist being moved

Question 2

Newton’s first law of motion

Answer 2

An object at rest will continue to be rest and an object in motion will continue to be in motion until it experiences an unbalanced force

Question 3

Free fall

Answer 3

The motion of a body when only the force of gravity is acting on the body

Question 4

Terminal velocity

Answer 4

The velocity of a falling object when the air resistance is equal in magnitude and opposite in direction to the force of gravity.

Question 5

Projectile motion

Answer 5

The curved path of an object when it is near the surface of the earth

Question 6

Law of universal gravitation

Answer 6

All matter is affected by gravity

Question 7

Weight

Answer 7

The gravitational force an object experiences because of its mass

Question 8

Apparent weightlessness

Answer 8

An object will experience free fall in space and it will accelerate at the same rate which is referred to as apparent weightlessness.

Question 9

Newton’s third law of motion

Answer 9

For every action force there is an equal and opposite reaction force

Question 10

Action force

Answer 10

When an object exerts a force on a second object it is called a action force

Question 11

Reaction force

Answer 11

When a second object reacts to the action force of another object it is called a reaction force