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Q.

A particle of mass 200 g is dropped from a height of 50 m and another particle of mass 100 g is simultaneously projected up from the ground along the same line, with a speed of 100 m/s. The acceleration of the center of mass after 1 second is

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a

10 m/s2

b

103m/s2

c

Zero

d

None of these

answer is A.

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Detailed Solution

The net force acting on the system of particle is gravity. So the center of mass will have acceleration 10 m/s2
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A particle of mass 200 g is dropped from a height of 50 m and another particle of mass 100 g is simultaneously projected up from the ground along the same line, with a speed of 100 m/s. The acceleration of the center of mass after 1 second is