162. Work may be defined as

A. force x distance

B. force x velocity

C. force x acceleration

D. none of these.

163. Energy may be defined as

A. power of doing work

B. capacity of doing work

C. rate of doing work

D. all the above.

164. Power can be expressed as

A. work/energy

B. work/time

C. work x time

D. work/distance.

165. The practical units of work, is

A. erg

B. joule

C. Newton

D. dyne.

166. The product of mass and velocity of a moving a. body, is called

A. moment

B. momentum

C. power

D. impulse.

167. The unit of impulse, is

A. kg.m/sec

B. kg.m2/sec

C. kg.m/sec2

D. kg.m2/sec2.

168. According to Kennedy's theorem, if three bodies have plane motion, their instantaneous centres lie on

A. a point

B. a straight line

C. two straight lines

D. a triangle.

Page **24** of **34**