Unit 2: Forces

Question 1

Force

Answer 1

Any push or pull exerted on an object

Question 2

Applied Force

Answer 2

Any force applied on an object by another object that either pushes or pulls it

Question 3

Tension

Answer 3

A pulling force exerted on an object by a rope or string

Question 4

Normal Force

Answer 4

The force exerted on an object by a surface in contact with it

Question 5

Force of Friction

Answer 5

Opposes the sliding of two surfaces across each other

Question 6

Force of Gravity

Answer 6

The force of attraction between any two objects due to their mass

Question 7

Newton’s First Law

Answer 7

If the net force acting on an object is zero, the object maintains its state of rest or uniform motion at constant velocity

Question 8

Newton’s second Law

Answer 8

If the external net force on an object is not zero, the object accelerates in the direction of the net force. The acceleration is directly proportional to the net force, and inversely proportional to the object’s mass

Question 9

Newton’s Third Law

Answer 9

Whenever an object exerts a force onto a second object, the second object exerts an equal force in the opposite direction on the first one

Question 10

Inertia

Answer 10

The tendency of an object to resist changes in its state if rest or motion