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`        A ball of mass m is thrown upward and another ball of same mass is thrown downward so as to move freely under gravity. The acceleration of centre of mass is`
one year ago

Piyush Kumar Behera
372 Points
```							 The acceleration of the centre of mass is the net force on the centre of mass,as only gravitational force due to the earth is acting on both the bodies so the net force on the centre of mass of the bodies will be only gravitational force .So the acceleration of the centre of mass is g(=9.8m/s2).Alternatively you can also calculate using the formula of acceleration of centre of mass=m1a1+m2a2/m1+m2.You will get the same answer.IF you still couldnt get it you can ask again.  Please upvote the solution to encourage me
```
one year ago
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