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jj8890

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**[SOLVED] Force for uniform circular motion**

## Homework Statement

A 61.7 kg ice skater is moving at 3.55 m/s when she grabs the loose end of a rope, the opposite end of which is tied to a pole. She then moves in a circle of radius 0.545 m around the pole. The acceleration of gravity is 9.8 m/s^2.

a. Find the force exerted by the rope on her arms. Answer in units of kN.

b. Find the ratio of this tension to her weight.

## Homework Equations

F=(mv^2)/r

## The Attempt at a Solution

I got a using the above equation:

F=((61.7) * (3.55)^2)/.545

F=1426.74 N or 1.42674 kN

I know this is right for part a, I just don't understand what they are asking for part b or what equation to use. I would appreciate any help.

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