Question

A skydiver was released (with zero initial velocity) from a helicopter at a certain distance from the surface of the ground. Unfortunately, her parachute did not open and she hit the ground with the velocity of 180 km/h. Acceleration during her journey was approximately 10 m/s2. Then the time taken by her to reach the surface of the Earth is

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Answer 1

Explanation:

By 1 eq. of motion.

v=u+at

change km/hr into m/sec

180km/hr= 50m/sec

50=0+10×t

50=10t

t=50÷10=5sec

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