A particle of mass `m` is moving along the line `y=b,z=0` with constnat speed `v`. State whether the angular momentum of particle about origin is increasing. Decreasing or constant.
Text Solution
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`|vecL|=mvsitheta=mvr_|_mvb` `:. |vecL|=` constant as `m,v` and `b` all are constants. Direction of `vecrxxvecv` also remains the same. Therefore, angular momentum of the particle about the origin remains constant with due course of time.
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