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    				| 1. | () Define angular displacement, angularvelocity and angular acceleration. | 
| Answer» Angular displacement of a body is the angle in radians through which a point revolves around a centre or line has been rotated in a specified sense about a specified axis. The rate of change of angular displacement of a rotating body. Angular acceleration is the rate of change of angular velocity. In three dimensions, it is a pseudovector. In SI units, it is measured in radians per second squared, and is usually denoted by the Greek letter alpha. | |