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The final velocity of a falling object can be worked out by the use of the formula a = (v - u)/t a = acceleration due to gravity = 9.8 m.s-2 v = final velocity = unknown u = initial velocity = 0 t = time taken = 3.5s Factor these known values into our equation 9.8 = (v - 0)/3.5 rearrange the formula to workout the unknown value v = 9.8 x 3.5 Final velocity on impact with valley floor = 34.3 m.s-1 with a downwards direction

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15y ago
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3y ago

9.8 m/s

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Q: If rock at rest falls off a cliff and hits the valley below after 3.5 seconds what is the rocks velocity as it hits the ground?
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