148. The unit of moments in M.K.S system, is

A. kgm

B. kg/m2

C. kg/sec2

D. kg/sec.

149. The characteristic of a couple, is :

A. algebraic sum of forces, constituting a couple is zero

B. algebraic sum of moments of the forces, constituting a couple, about any point, is same

C. a couple can be balanced only by a couple but of opposite sense

D. all the above.

150. The unit of Moment of Inertia of a body, is

A. m

B. m2

C.m3

D. m4

151. The velocity of a moving body, is

A. a vector quantity

B. a scalar quantity

C. a scalar as well as a vector quantity

D. none of these.

152. The rate of change of displacement of a body with respect to its surrounding, is known

A. velocity

B. acceleration

C. speed

D. none of these.

153. A stone is whirled in a vertical circle, the tension in the string, is maximum

A. when the string is horizontal

B. when the stone is at the highest position

C. when the stone is at the lowest position

D. at all the positions.

154. If the linear velocity of a point on the rim of a wheel of 10 m diameter, is 50 m/sec, its angular velocity will be

A. 20 rad/sec

B. 15 rad/sec

C. 10 rad/sec

D. 5 rad/sec.

Page **22** of **34**