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# CBSE Class 9 Answered

Shyam throws a heavy stoneout of his boat as a result the boat moves in the opposte direction , why?

Asked by kishor.kp14 | 25 Jul, 2019, 03:48: PM
Coordintates of Centre of mass with respect to some reference point do not change if external force is not acting on it.

when the stone is in  boat , the point of center of mass also in boat.
This is because from  a refernce point, stone and boat are at same distance.

When stone is thrown out, the distance between stone and reference point is getting changed.
Hence centre of mass will shift slightly in the direction  of motion of stone.

In order to make the coordinates of centre of mass constant, the boat moves in opposite direction and
thereby Center of mass remains at same position
Answered by Thiyagarajan K | 25 Jul, 2019, 04:18: PM

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