What is the magnitude and centripetal force?

Question

In a skating stunt known as "cracking-the-whip," a number of skaters hold hands and form a straight line. They try to skate so that the line rotates about the skater at one end, who acts as the pivot. The skater farthest out has a mass of 80.0 kg and is 4.90 m from the pivot. He is skating at a speed of 5.40 m/s. Determine the magnitude of the centripetal force that acts on him.

what is the magnitude OF centripetal force**

Answer 1

the force is m*v^2/r

80*5.4^2/4.9

476 N

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