Question

Two spheres of same size, one of mass 2 kg and another of mass 4 kg, are dropped simultaneously from the top of Qutab Minar (height = 72 m). When they are 1 m above the ground, the two spheres have
the same
a) momentum
b) kinetic energy
c) potential energy
d) acceleration​

Answer 1

AnSwer :-

Option (d) Acceleration is correct.

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Explaination :-

When two spheres are dropped from rest, force of attraction due to earth acts on it . Under the force of attraction they will acquire the same acceleration which is due to Gravitational effect.

Also, $\sf g = \dfrac{ GM}{R ^{2} }$

in which Accerlation due to gravity is independent of mass of the body.

Hence, the two spheres have the same acceleration.