A ball is thrown vertically upwards. It returns 6s later. Calculate : (1) the greatest height reached by the ball, and (2) the initial veloc

Question

A ball is thrown vertically upwards. It returns 6s later. Calculate : (1) the greatest height reached by the ball, and (2) the initial velocity of the ball. (Take g=9.8m/s2) ​

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Huyền Thanh 5 years 2021-08-12T18:08:02+00:00 1 Answers 13 views 0

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  1. thachthao
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    2021-08-12T18:09:36+00:00
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    Answer:

    greatest displacement = 44.1m

    initial velocity= 29.4m/s

    Explanation:

    Greatest displacement

    s=1/2at^2

    = (9.8/2 ×9)m

    = 44.1m

    initial velocity

    s=ut-1/2at^2

    44.1= 3u -(1/2×9.8×9)

    44.1=3u-44.1

    3u=88.2

    u=29.4m/s

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