Physics: Force and Rotational Motion

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A 59.0-kg ice skater is moving at 3.93 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 0.870 m around the pole.

(a) Determine the magnitude of the force exerted by the horizontal rope on her arms. (b) Compare this force with her weight. 

Jun 30th, 2015

Thank you for the opportunity to help you with your question!

a. force exerted =Angular momentum=rmv*sinangle;since is horizontal,the angle is 90 degrees

=0.870m*59.0kg*3.93m/s*sin 90=180.34317 N

b. The force is directly proportional to her weight .This because Force is a factor of momentum.

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 30th, 2015

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Jun 30th, 2015
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