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Newton's Laws for System of Particles

Two balls of ...

Question

Two balls of equal masses are thrown at the same timein vacum .While they are in vacum,the acceleration of their certain of mass

A

Depends on masses of the balls

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B

Depends on direction of motion of the balls

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C

Depends on speed of the balls

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D

Is equal to acceleration due to gravity

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Solution

The correct option is D Is equal to acceleration due to gravity
Since there is no force in the horizontal direction so there will be no acceleration of centre of mass in the horizontal direction. Irrespective of the direction, mass or speed of the two balls only force is the gravitational force acting on it. Hence acceleration of the center of mass will be the acceleration due to gravity g. Hence The acceleration of the centre of mass of the two balls, while in the air is equal to g.
Hence, opyion 'D' is correct.

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