Newtons Laws

Question 1

Weight (Fg)

Answer 1

The gravitational force that the earth experts on any object on or near its surface

Question 2

Normal force

Answer 2

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

Question 3

Frictional force

Answer 3

The force that opposes the motion of an object

Question 4

Newtons first law

Answer 4

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 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

Newtons 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. The acceleration, a, is directly proportional to the net force and inversely proportional to the mass.

Question 7

Newtons second law (in terms of momentum)

Answer 7

The net force acting on an object is equal to the rate of change of momentum.

Question 8

Newtons Third law

Answer 8

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