A packet is dropped from a stationary helicopter, hovering at a height 'h' from ground level, reaches the ground level in 12seconds. Calculate (1) value of h (2) final velocity on reaching ground level. [Take g=9.8m/s2]
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h=5×12×12=144×5=720m
v=0+10×12=120m/s
v=0+10×12=120m/s
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