A particle of mass m is moving along the side of a square of side 'a', with a uniform speed u in the x-y plane as shown in the figure: [JEE MAIN - I 3-4-2016] |
Which of the following statement is false for the angular momentum \[\vec{L}\] about the origin? |
A) \[\vec{L}=\frac{m\upsilon }{\sqrt{2}}R\hat{k}\] when the particle is moving from D to A
B) \[\vec{L}=-\frac{m\upsilon }{\sqrt{2}}R\hat{k}\] when the particle is moving from A to B
C) \[\vec{L}=m\upsilon \left[ \frac{R}{\sqrt{2}}-a \right]\hat{k}\] when the particle is moving from C to D
D) None of these
Correct Answer: D
Solution :
[a, c] |
or or |
For D to A |
For A to B |
For C to D |
For B to C |
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