Newton’s Laws

Question 1

Weight (Fg)

Answer 1

The gravitational force the Earth exerts on any object on or near its surface

Question 2

Normal force (FN)

Answer 2

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

Question 3

Frictional force due to a surface (Ff)

Answer 3

The force that opposes the motion of an object and acts parallel to the surface with which the object is in contact

Question 4

Newton’s first law of motion

Answer 4

An object continues in a state of rest or uniform (moving with constant) velocity unless acted upon by a net or resultant force

Question 5

Inertia

Answer 5

The property of an object that causes it to resist a change in its state of rest or uniform motion

Question 6

Newton’s Second Law of Motion

Answer 6

When a net force, Fnet, is applied to an object of mass, m, it accelerates in the direction of the net force. The acceleration, a, is directly proportional to the net force and inversely proportional to the mass

Question 7

Newton’s Third Law of Motion

Answer 7

When object A exerts a force on object B, object B simultaneously exerts an oppositely directed force of equal magnitude on object A