A ballon raising vertically with a velocity of 5m/sec drops a body from a height of 20m above the ground.The velocity of the body 1sec after release is

Dear Chakrala,

 given, 20 = 5 - 10* t²/2

or t = sqrt3

now body is drop, so

v = u + at

V = -20 + 10(t+1) = 7.32 m/s

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