Newtons Laws

Question 1

First law

Answer 1

An object continues in a state of rest or uniform velocity unless acted upon by a net force

Question 2

Inertia

Answer 2

Property of a body to resist any change in its state of rest or motion

Question 3

Second law

Answer 3

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

Question 4

Net force

Answer 4

A single force that had the same effect as the original forces acting together

Question 5

Third law

Answer 5

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

Question 6

Universal gravitation

Answer 6

Every object in the universe attract every other object in the universe with a force that is directly proportional to the product of their masses and inversely to the square of the distance between their centres

Question 7

Gravitational field force

Answer 7

Gravitational force exerted in an object per kg of objects mass

Question 8

Weight

Answer 8

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

Question 9

Normal force

Answer 9

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

Question 10

Frictional force due to a surface

Answer 10

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