Forces and Newtons Laws

Question 1

Normal Force

Answer 1

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

Question 2

Weight

Answer 2

The gravitational force that earth exerts on any object on or near its surface.

Question 3

Friction

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

Inertia

Answer 4

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

Question 5

Newton’s first law

Answer 5

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

Question 6

Newton’s second law

Answer 6

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

Question 7

Newton’s third Law

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