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28 November, 15:00

how much centripetal force is needed to make a body of mass 0.5 kg to move in a circle of radius 50 cm with a speed 3ms-1

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  1. 28 November, 17:59
    0
    F = (mv^2) / r

    = (0.5 * 3^2) / 50*10^-2

    = 9N
  2. 28 November, 18:46
    0
    9 N

    Explanation:

    The centripetal force F is F = mrω^2 = (mv^2) / r where m is mass, r is radius of the curve, ω is angular velocity and v is tangential velocity.

    In this case, m = 0.5kg, r = 0.5m, v = 3m/s

    So F = [0.5kg (3m/s) ^2]/0.5m = 9kg-m/s^2 which is 9N
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