Circular Motion

Question 1

Angular velocity

Answer 1

Angular velocity is the rate of change of angle with respect to time

Question 2

Unit of angular velocity

Answer 2

The unit of angular velocity is the radian per second

rads / s

Question 3

Centripetal force

Answer 3

If a body is moving in a circle the force towards the centre needed to keep it moving in that circle is called centripetal force

Question 4

Centripetal acceleration

Answer 4

If a body is moving in a circle the acceleration it has towards the centre of the circle is called centripetal acceleration

Question 5

Period of an orbit

Answer 5

The time taken for a satellite to go once around the central body is called the periodic time or simply the period (T) of the orbit