An iron sphere of mass 10 kg has the same diameter as an aluminium sphere of mass is 3.5 kg. Both spheres are dropped simultaneously from a tower. When they are 10 m above the ground, they have the same (a) acceleration (b) momenta (c) potential energy (d) kinetic energy


The masses of the iron and aluminium spheres are different. Both will, however, fall under the acceleration due to gravity g=9.8m/s2. The acceleration of an item in free fall is independent of its mass.

  • Momentum, potential energy and kinetic energy varies with weight.
  • But in this case, acceleration is because of acceleration due to gravity which is independent of mass.

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