A ball is thrown downward from the top of a 55.0 m tower with an initial speed of 15.0 m/s. Assuming negligible air resistance, what is the

Question

A ball is thrown downward from the top of a 55.0 m tower with an initial speed of 15.0 m/s. Assuming negligible air resistance, what is the speed of the ball just before hitting the ground?

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Vodka 4 years 2021-08-27T19:20:14+00:00 1 Answers 33 views 0

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  1. Orla
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    2021-08-27T19:21:23+00:00
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    Answer:

    36.4m/s

    Explanation:

    According to equation of motion,

    v² = u²+2as where;

    v is the final velocity

    u is the initial velocity = 15m/s

    a is the acceleration due to gravity = +g (it is positive because the body is thrown downwards.)

    g = 10m/s²

    s will be the distance from the top of the tower from which it is thrown

    S = 55.0m

    Substituting this value to get the final velocity, we have;

    v² = 15²+2(10)(55)

    v² = 225+1100

    v² = 1325

    v =√1325

    v = 36.4m/s

    Therefore, the speed of the ball just before hitting the ground will be 36.4m/s

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