calculate the height from which a body is released from rest if its velocity just before hitting the ground is 30 metre per seconds​

Question

calculate the height from which a body is released from rest if its velocity just before hitting the ground is 30 metre per seconds​

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Delwyn 5 years 2021-08-20T02:40:26+00:00 1 Answers 317 views 1

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  1. Euphemia
    0
    2021-08-20T02:42:04+00:00
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    Answer:

    height is 45 metres

    Explanation:

    KE=PE

    ¹/²mv² = mgh

    ¹/²v² = gh

    but v =30m/s

    (30)² / 2 =10h

    450=10h

    h = 45m

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