Question

A stone is dropped under gravity from rest from a height h and it travels a distance 15m in last second. The time taken by the stone to reach ground is (g = 10 2 / ms) 1) 1 sec 2) 3 sec 3) 2 sec 4) 8 sec

Answer 1

Answer:

We know,

Acceleration due to gravity on moon=6g

g=aceleration due to gravity on earth.

h=21g12

h=21×6gt2

t2=6

t=6

Option A is the correct answer