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Example 8.3 Usha swims in a 90 m longpool. She covers 180 m in one minuteby swimming from one end to the otherand back along the same straight pathFind the average speed and averagevelocity of Usha.

Answer»

Length of the pool: 90mAverage speed:Speed= Distance/Timespeed=180/60speed=30 m/s

Velocity:velocity=displacement/time

displacement=0( Since she comes back to the same place)

velocity=0



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