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171.

The unit of angular velocity is

A.	m/min	B.	rad / s
C.	revolutions / min	D.	all of these

172.

The angular velocity (in rad / s) of a body rotating at N revolutions per minute is

A.	? N / 60	B.	? N / 180
C.	2? N / 60	D.	2? N/180

173.

The unit of angular acceleration is

A.	N - m	B.	m / s
C.	m / s2	D.	rad / s2

174.

The linear velocity of a body rotating at ? rad / s along a circular path of radius r is given by

A.	? / r	B.	?.r
C.	?2/r	D.	?2.r

175.

The linear acceleration (a) of a body rotating along a circular path of radius (r) with an angular acceleration of ? rad / s2, is

A.	a = ? / r	B.	a = ?.r
C.	a = r / ?	D.	none of these

176.

Which of the following are vector quantities?

A.	Angular displacement	B.	Angular velocity
C.	Angular acceleration	D.	all of these

177.

The motion of a particle round a fixed axis is

A.	translatory	B.	rotary
C.	circular	D.	translatory as well as rotatry

178.

In order to completely specify angular displacement by a vector, it must fix

A.	direction of the axis of rotation	B.	magnitude of angular displacement
C.	sense of angular displacement	D.	all of these

179.

When a particle moves along a circular path, its acceleration has two components, one is normal component and the other is tangential component of acceleration

True

False

180.

When a particle moves along a straight path, there will be centripetal acceleration as well as tangential acceleration.

Right

Wrong