First slide

Angular momentum

Question

A particle is moving uniformly along a straight line as shown in the figure. During the motion of the particle from A to B, the angular momentum of the particle about ‘O’

Moderate

A

increase
B

decrease
C

remains constant
D

first increase then decreases

Solution

Angular momentum about the origin = Magnitude of linear momentum x shortest distance of the line AB from the origin
= constant.

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