Question

A man pushes a lawnmower of mass 50kg at a constant velocity over a horizontal lawn. He exerts a push of 200N on the handle at an angle of 60° to the horizontal and the lawnmower moves to the left.

The question is determined the frictional force on the mower
the velocity is constant
... so the frictional force equals the horizontal pushing force

frictional force = 200 cos(60º) ... Newtons

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