A ball is thrown vertically upwards twice once with a velocity 40 m/s and then with a velocity 80 m/s. The ratio of
distance travelled by the ball in last second of its upward journey in the two cases is 1 : R. Find 'R'.
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Hii :)
=>
velocity after 2 sec.
v=40+(−10)t
=40−10∗2=20m/s
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