A skater holds her arms outstretched as she spins at 180 rpm. what is the speed of her hands if hey are 140 cm apart

Question

Donald Elliott

Physics

5 September, 12:48

A skater holds her arms outstretched as she spins at 180 rpm. what is the speed of her hands if hey are 140 cm apart

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Answers (1)

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Danna · Answer 1

The frequency is 180 revolutions per minute or rpm. In physics, we can find the tangential speed of the hands using the formula:

v = rω,

where v is the speed, r is the radius of the circle and ω is the frequency

v = (140 cm/2) (180 rev/min) (1 min/60 s)

v = 210 cm/s