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10 December, 23:57

A slingshot fires a pebble from the top of a building at a speed of 10.3 m/s. The building is 38.4 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when it is fired vertically straight up.

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  1. 11 December, 00:00
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    29.30m/s

    Explanation:

    From the question the equation the net work done by the external non-conservative force is zero Wnet work = 0J
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