A concrete block of msss 10kg is pulled 70m across a, Physics

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A concrete block of msss 10kg is pulled 70m across a

A concrete block of msss 10kg is pulled 7.0m across a frictionless surface by means of a rope and the net work done on the block is 220J. The tension in the rope is 40N and it makes an angle 30 degrees to the horizontal, what is the magnitude of the normal force acting on the block?

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