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Units and Dimensions

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Show that the angular momentum about any point of a single particle moving with constant velocity remain constant throughout the motion. Is there any external torque on the particle

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Q. Assertion :If a particle moves with a constant velocity, the angular momentum of this particle about any point remains constant. Reason: Angular momentum has the units of Plank's constant.

Q. If a particle moves with a constant velocity, the angular momentum of this particle about any point

Q. Assertion :In planetary motion angular momentum of planet about centre of sun remains constant. But linear momentum does not remain constant. Reason: Net torque on planet about any point is zero.

Q. A particle moves in a straight line with a constant angular acceleration then its angular momentum is ....................... (about any fixed point).

Q. Assertion :If linear momentum of a particle is constant, then its angular momentum about any axis will also remain constant. Reason: Linear momentum remain constant, if

{\to F}_{n e t} = 0

and angular momentum remains constant if

{\to T}_{n e t} = 0

.

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