A disc of radius R is moving on a rough ...

A disc of radius `R` is moving on a rough horizontal surface with velocity `v` and angular speed `omega` at an instant as shown in figure. Choose the correct statement.

If `v gt omegaR`, the force of friction will act in backward direction

If `v lt omegaR`, the force of friction will act in forward direction

If `v=omegaR` the force of friction must be zero.

If `v=omegaR` the force of friction will not be zero.

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