An apple, a brick and a hammer are all dropped from the second floor of a buildi

Question

An apple, a brick and a hammer are all dropped from the second floor of a building. Which object(s) will hit the ground first? The brick will hit first. Without knowing the masses of the objects, we cannot tell which one hits the ground first. The brick and the hammer will hit the ground first in a tie. The hammer will hit first. The apple and the brick will hit the ground first in a tie. The apple will hit first. The hammer and the apple will hit the ground first in a tie. They all hit the ground at the same time.

Explanation / Answer

They all hit the ground at the same time.

Because we know that H= ut +1/2gt2 and here a/c to question initial velocity u=0

hence H=1/2gt2

and t=(2H/g)1/2

Note: Here time t doesn't depend on mass hence They all hit the ground at the same time.

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