## Centre Of Mass

Introduction An object may be made to balance at a particular point.

## Newton’s Laws Of Motion

Introduction Newton’s laws of motion are three physical laws that describe the relationship between a body and the forces acting upon it, and its motion in response to those forces.

## Projectile Motion

Introduction Consider a car that is moving in a straight line.

## Scalars & Vectors

Introduction Consider a car that is travelling from city A to city B.

## Conditions For Equilibrium

Introduction An object is said to be in equilibrium if the resultant force acting on the object is zero or the sum of the moments acting on the object is zero.

## Resolving Vectors

Introduction A quantity with magnitude and direction is defined as a vector quantity.

## Longitudinal & Transverse Waves

Introduction Wave motion is a means of moving energy from place to place.

## Refraction

Introduction Refraction is the change of direction of wave that occurs when its speed changes.

## Interference

Introduction If two or more waves collide, they are said to interfere.

## Progressive Waves

Introduction Waves, which move from place to place without the transfer of matter, are called progressive waves.