Newton’s Laws

Question 1

Weight (Fg)

Answer 1

The gravitational force the Earth exerts on any 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

Inertia

Answer 4

The property of an object that causes it to resist a change in 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 velocity unless it is acted upon by a net force

Question 6

Newton’s second law

Answer 6

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

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.

Question 8

One Newton

Answer 8

The amount of force required to give a 1kg mass an acceleration of 1 m.s-2.