Question

A stone is projected horizontally from a cliff at 10 m/sec and lands on the ground below at 20 m from the base of the cliff. find the height h of the cliff. use g = 10 m/sec2

Answer 1

the range of the particle is given by


r=u√(2h/g)
r=20
u=10
g=10
20=10√(2h/10)
4=(2h/10) (squaring both sides)
40=2h
h=20 m


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