Question

a body falls from a height of a 125 m and g = 10 m / s square after 2 sec gravity teases to at. find time to reach ground

Answer 1

...............h = 125 meters

v = u + g t 
   = 0 + 10 m/s/s * 2 sec = 20 m/s
distance traveled in 2 sec 
  s = u t + 1/2 g t^2 = 0 + 1/2 *  10 * 2^2 = 20 meters

Distance to travel = 125 - 20 = 95 m
velocity = 20 m/sec   is constant as there is no gravity.

time taken = 95m/ 20 m/s   = 4.75seconds

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