Question

two stones A and B are dropped from a multi storey building a is dropped from hundred metre and after some time b is dropped from 15 metre height but both of them reach the earth at the same time will they have equal velocity while reaching the ground calculate and find out the answer​

Answer 1

For the stone A, height h = 100 m, g = 10 m/s2

Velocity on reaching the ground is, v2 = u2 + 2as

=> v2 = 0 + 2(10)(100)

=> v = 44.7 m/s

For the stone B, height h = 15m, g = 10 m/s2

Velocity on reaching the ground is, v2 = u2 + 2as

=> v2 = 0 + 2(10)(15)

=> v = 17.3 m/s

Thus, the velocities of the stone are not same when they reach the ground.