EP015 Assessment 6 : Circular Motion

When an object moves in a uniform circular motion, the magnitude of its velocity, v ………, …… the direction of the velocity, v ……………. with time.

• remains constant, and, remains constant

• remains constant, but, continually changing

• continually changing, but, remains constant

• continually changing, and, continually changing

Period, T refers to the time taken for an object to make ………………..

• 10 complete revolutions.

• 2 complete revolutions.

• 1 complete revolution.

• 1/2 complete revolution.

The SI unit for period is ….

• millisecond.

• second.

• minute.

• hour.

The dimension of period is …

• M

• L

• T

• s

Frequency, f refers to the number of revolutions made by an object for every ………...

• 1 milisecond

• 1 second

• 1 minute

• 1 hour

The SI unit for frequency is ….

• Watt

• Joule

• Hertz

• Newton

The dimension of period is …

• M^-1

• L^-1

• T^-1

• s^-1

Centripetal acceleration is produced due to the change of …..

• the magnitude of angular velocity.

• the direction of angular velocity.

• the magnitude of velocity.

• the direction of velocity.

What is the direction of the centripetal acceleration?

• Parallel to the circular path.

• Perpendicular to the circular path.

• Towards the centre of circular path.

• Outwards the centre of circular path.

The SI unit of centripetal acceleration is ….

• ms^-2

• ms^-1

• rad s^-2

• rad ms^-1