a stone is thrown vertically upward with a speed of 14.7 meter per second he return in 8 second. find the height of a building
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Answer:
a = -g = -10 m/s^2
u = 14.7 m/s
time taken by stone in reaching the top most height when final velocity is 0, t = 4 sec
therefore,
s= ut+1/2at^2
= 14.7×4 + 1/2×(-10)×4×4
= 58.8 - 80
= 21.2 metre
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