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A block of mass m moves on a horizontal ...

A block of mass `m` moves on a horizontal rough surface with initial velocity `v`. The height of the centre of mass of the block is `h` from the surface. Consider a point `A` on the surface.

A

Angular momentum about `A` is `mvh` initially.

B

The velocity of the block decreases as time passes

C

Torque of the forces acting on block is zero about `A`

D

Angular momentum is not conserved about `A`

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A, B, D
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