An eraser weighing `2N` is pressed against the black board with a force of `5N`. The coefficient of friction is `0.4`. How much force parallel to the black board is required to slide the eraser upwards

An eraser weighing 2 N is pressed against the black board with a force of 5 N. If the coefficient of friction is 0.4. How much force parallel to the black board is required to slide the eraser upwards.

An eraser weighing 2N is pressed against the black board with a force of 5N. If the coefficient of friction is 0.4. How much force parallel to the black board is required to slide the eraser upwards

An eraser weighing 2N is pressed against the black board with a force of 5N. If the coefficient of friction is 0.4. How much force parallel to the black board is required to slide the eraser upwards

A duster weighs 0.5N. It is pressed against a vertical board with a horizontal force of 11N, If the co-efficient of friction is 0.5 the minimum force that must be applied on the duster parallel to the board to move it upwards is