body is moving along a circular path of radius 7m and completes one rotation in 2 seconds. its speed is
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The circumference of the circular path is 2×π×r ( distance travelled in one rotation is equal to the circumference of the circular path)
So, 2×π×7 = 14π meters
It travels this distance in 2 seconds, so the speed is the distance traveled divided by time:
14π m / 2 s = 7π m/s
Taking value of π to be 22/7, we get
Speed = 22 m/s
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