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A particle is moving along a straight li...

A particle is moving along a straight line. Its displacement-time graph is shown

`{:(,,"Column-I",,"Column-II"),(,(A),"Work done on particle from 0 to "t_(1),(P),"Positive"),(,(B),"Work done on particle from " t_(1) " to " t_(2),(Q),"Negative"),(,(C),"Work done on particle from " t_(2) " to " t_(3),(R),"zero"),(,(D),"Work done on particle from " t_(3) " to " t_(4),(S),"Unpredectible"):}`

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