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Multiplication with Vectors

In the given ...

Question

In the given figure of square plate, possible axis of rotation is shown,if in each case we give same angular impulse parallel to the axis shown then

A

angular momentum about axis 1 and 2 will be same

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B

angular momentum about axis 1 and 3 will be same

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C

angular momentum about axis 1 and 4 will be same

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D

none of the above

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Solution

The correct option is B angular momentum about axis 1 and 3 will be same
The axis $1$ & $3$ are symmetric. thus for a same $Z$ , the angular momentum about them will be same.

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