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A 1.0 kg mass is attached to the end of a 1.00 m long string and swung in a horizontal circle. If the mass completes one cycle in 0.42 s, the speed of the mass is
Since the mass is moving in a horizontal circle, we do not look at gravity, tension in string or weight of the mass. Time period for one cycle around circle = T = 0.42 seconds
Tangential Velocity or speed of the mass = tangential distance traveled in 1 cycle or revolution / time period = circumference of circle / time period = 2 π radius / T = 2 π 1 meter / 0.42 sec = 14.96 m/s
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