Usha swims in a 90 m long pool. She covers 180 m in one minute, swimming from one end to the other and back along the same straight path. i Find the average speed and average velocity of Usha ii. Do you find a difference in their magnitudes? If so, explain what is the difference and why? iii. Write the differences between speed and velocity.
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Answer:
Distance = 180 m
time = 1 min = 60 seconds
average speed = total distance covered / total time taken
= 180 m / 60 sec
= 3 m/s
Displacement = 0/s ( as usha come back along the same path so, the intial and final decision is same )
average velocity = displacement /time
= 0m/ 60s
= 0m/s
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