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19 September, 10:40

A dolphin is trying to jump through a hoop that is fixed at a height of 3.5 m above the surface of her pool. The dolphin leaves the water at an angle of inclination of 40°. Determine the minimum speed the dolphin will need when leaving the water in order to reach the height of the hoop.

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  1. 19 September, 10:53
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    Vertical speed u = v sinФ

    Energy is conserved:

    E = mgh = 1/2mu²

    u = √ (2gh)

    v = √ (2gh) / sinФ

    g = 9.81 m/s²

    h = 3.5

    Ф = 40°
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