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26 January, 01:10

Calculate the force of friction that keeps an 80-kg person sitting on the edge of a horizontal rotating platform when the person sits 2 m from the center of the platform and has a tangential speed of 3 m/s.

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  1. 26 January, 03:00
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    360N

    Explanation:

    The frictional force = centripetal force = mass * centripetal acceleration = ma

    Since centripetal acceleration = V^2 / r

    Frictional force = mv^2 / r

    Substitute the values of m = 80kg, radius = 2m and tangential speed = 3m/s

    Frictional force = 80 * (3) ^2 / 2 = 360N
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