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Q.

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


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a

Acceleration

b

Momentum

c

Potential energy

d

Kinetic energy 

answer is A.

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Detailed Solution

The iron and the aluminium spheres will have the same acceleration.
When we drop two different bodies of different masses from a certain height, the acceleration would be due to gravity acting on both bodies(g). Since acceleration due to gravity is constant and does not depend on the mass of the bodies, it is the same for all the bodies in the earth’s gravitational field. Thus, both bodies have the same acceleration.
 
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