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

Physics

Brycen Pruitt

11 March, 07:49

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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Furball · 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