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A solid cylinder is given a velocity v(0...

A solid cylinder is given a velocity `v_(0)` and an angular speed `omega_(0)` in the anticlockwise direction and then it is placed gently on a very long rough plank ( initially at rest ) as shown in the figure. Then, choose the incorrect statement `:`

A

the friction force on the disc is in the backward direction till pure rolling starts

B

the friction force between the disc and the plank is kinetic in nature till pure rolling starts

C

the total momentum of system ( disc and plank ) is conserved

D

the angular momentum of the disc about any point on the horizontal surface remains conserved

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The correct Answer is:
D
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