A ball of mass 200gm falls from a height of 5mtr calculate when it just reaches the ground? (g = 10 ms power minus square)
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height=5m.
mass=200g (0.2 kg)
g=9.8m/s^2
∴ potential energy=mgh
= 0.2*5*9.8
= 9.8 J
∵ P.E at the highest point= K.E at the lowest point (when it is just about to hit the ground)
∴ K.E energy will be= 9.8 J
mesrajiv1972:
When g =10mspower minus square, then how can be the answer 9.8
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