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(D) When objects are dropped from a height,they undergo free fall under the influence of gravity.According to the laws of motion,the acceleration of a

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(D) When objects are dropped from a height,they undergo free fall under the influence of gravity.According to the laws of motion,the acceleration of an object in free fall is equal to the acceleration due to gravity $(g)$,which is approximately $9.8 \, m/s^2$.This acceleration due to gravity is independent of the mass,size,or shape of the falling object.Since both spheres are dropped from the same height at the same time,at any given point (such as $10 \, m$ above the ground),they will have the same velocity and consequently the same acceleration.Kinetic energy $(1/2 mv^2)$,momentum $(mv)$,and potential energy $(mgh)$ all depend on the mass $(m)$ of the object,which is different for the two spheres. Therefore,these quantities will not be the same.

An iron sphere of mass $10 \, kg$ has the same diameter as an aluminium sphere of mass $3.5 \, kg$. Both spheres are dropped simultaneously from a tower. When they are $10 \, m$ above the ground,they have the same

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