Chapter 11-Forces

Question 1

Inertia

Answer 1

When something resists moving or something resists a change of speed or direction from outside forces

Question 2

Newton’s first law of motion

Answer 2

An object at rest remains at rest and an object in motion maintains its velocity unless it experiences an unbalanced force.

Question 3

Newton’s second law of motion

Answer 3

The unbalanced force acting on an object equals the object’s mass times its acceleration

Question 4

Free fall

Answer 4

When only the force of gravity is working on an object

Question 5

Terminal velocity

Answer 5

When an object falls at constant velocity when air resists is equal in magnitude and opposite in direction to the force of gravity

Question 6

Projectile motion

Answer 6

An object has a curved path. Object moves in two dimensions under the force of gravity.

Question 7

Law of universal gravitation

Answer 7

F=G(m1m2/d^2)

Question 8

Weight

Answer 8

Gravitational force an object has from its mass

Question 9

Apparent weightlessness

Answer 9

A

Question 10

Newton’s third law of motion

Answer 10

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

Question 11

Action force

Answer 11

A force exerted on an object

Question 12

Reaction force

Answer 12

Equal size; opposite direction of action force