1.

If a freely falling body covers half of its total distance in the last second of its journey, Find its time of fall.

Answer»

SOLUTION :Suppose t is the time of free fall.
`H=(1)/(2)G t^(2)…….(1)`
`(h)/(2)=(1)/(2)g(t-1)^(2)..........(2)`
Solving 1, 2 `t=(2+sqrt(2))s`
SINCE `2-sqrt(2)` is not ACCEPTABLE.


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