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A block is projected up along the line o...

A block is projected up along the line of greatest slope of an inclined plane of angle of inclination `0(ltphi)` where `phi=` angle of friction. Which of the following friction time graph is CORRECT ?

A

B

C

D

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The correct Answer is:
A
First kinetic friction acts down the incline then static friction acts up the incline.
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