Answers

2016-02-27T22:10:43+05:30
Given m = 10 kg
h = 15 m

Therefore at halfway s = 15/2 = 7.5 m
u = 0 (consider it as falling from rest)
a = 9.8 (falling freely under gravity)
s = ut + ¹/₂at²
∴ t ≈ 1.237 s

v = u + at
v = 12.124

Therefore
K.E = ¹/₂ * m * v²
K.E = 734.9 J
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