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26 June, 15:44

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m? What is the pebble's speed when it has fallen 29.4 m?

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  1. 26 June, 19:26
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    Data given:

    Δx=29,4m

    Data needed:

    t=?

    v=?

    Formula needed:

    v=√2gh

    v=Δx/t

    Solution:

    v=√2*9,81*29,4

    v=24m/s

    t=Δx/v

    t=1,225s
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