Height of a tower is 80 m. Two balls A and B are thrown simultaneously. Ball A is thrown upwards with speed u from top of tower while ball B is thrown upwards with speed of 50 m/s from the foot of tower
(i) Ball A will reaches ground in 8 sec if ball do not collide then u is equal to –
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(i)
Sol. 30 m/s
(ii)
Sol. 120 m
(iii)
Sol. 5 sec
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