A stone is thrown horizontally with an initial speed of 7.5m/s from the edge of

Question

A stone is thrown horizontally with an initial speed of 7.5m/s from the edge of a cliff. A stopwatch measures thestone’s trajectory time from top of the cliff to the bottomto be 2.5 s. What is the height of the cliff? (Assumegravitational
acceleration is 9.8 m/s2.) A stone is thrown horizontally with an initial speed of 7.5m/s from the edge of a cliff. A stopwatch measures thestone’s trajectory time from top of the cliff to the bottomto be 2.5 s. What is the height of the cliff? (Assumegravitational
acceleration is 9.8 m/s2.)

Explanation / Answer

thus the stone is under free fall under gravity withacceleration g = 9.8 m/s2 with initial velocity u = 0 thus height H = 1/2 gt2  = 9.8*2.5*2.5/2 = 30.625m

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