A stone of mass 1 kg is thrown vertically upwards with a velocity of 19.6m/s. If the resistance by air is neglected, it will rise to a maximum height of
a) 4.9m
b) 9.8m
c) 19.6m
d) 39.2m
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Acceleration due to gravity is g = 9.8 m/ s^2. Therefore the velocity of the first thrown stone will reduce by 2*9.8 = 19.6 m/s in 2 seconds. That is it's velocity is zero after 2 second. Now the second stone is thrown up.
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