A ball is thrown horizontally from the top of a 41 m vertical cliff and lands 112 m from the base of the cliff. How fast is the ball thrown

Question

A ball is thrown horizontally from the top of a 41 m vertical cliff and lands 112 m from the base of the cliff. How fast is the ball thrown horizontally from the top of the cliff?

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Sigridomena 4 years 2021-08-20T10:08:21+00:00 1 Answers 15 views 0

Answers ( )

  1. niczorrrr
    0
    2021-08-20T10:10:06+00:00
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    Answer:

    4.78 second

    Explanation:

    given data

    vertical cliff = 41 m

    height = 112 m

    solution

    we know here time taken to fall vertically from the cliff =  time taken to move horizontally   ……………………..1

    so we use here vertical component of ball

    and that is accelerated motion with initial velocity = 0

    so we can solve for it as

    height = 0.5 ×  g ×  t²     ……………………2

    put here value

    112 = 0.5 ×  9.8 ×  t²    

    solve it we get

    t²   = 22.857

    t = 4.78 second

    ball thrown horizontally from the top of the cliff in 4.78 second

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