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19 January, 12:40

A 70kg divers steps off of a 10m tower and drops from rest straight into the water. If he comes to rest 5m beneath the surface, determine the average resistance force exerted on him by the water.

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  1. 19 January, 16:37
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    Kinetic Energy:

    K E = m g h

    h = 10 m, d = 5 m.

    m g (h + d) - F d = 0

    m g (h + d) = F d

    70 * 9.8 * 15 = F * 5

    10,290 = 5 F

    F = 10,290 : 5

    F = 2,058 N
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