MOTION

A Body is said to be at motion  if it  changes its position with respect to a fixed point taken as  reference point in its surrounding with the passage of time. 

           there are three types of motion . they are 

• Rectilinear motion          
• Circular motion
• Periodic motion

                 there are two types physical quantities in physics

1. Scalar quantities
2. Vector quantities

Rectilinear motion =a body is said to be

experience rectilinear motion if any two particles of the body travel  the same distance along two parallel straight lines.

Circular motion = in physics circular motion movement of an object along the circular or rotation along  a circular path.

Periodic motion = in physics motion repeated in a equal interval of a time .  Scalar quantity =a physical quantity which is described by its magnitude is called scalar quantity.

Vector quantity =some physical quantities cannot be described completely by their magnitude as well as its direction.