Mike is cutting the grass using a human-powered lawn mower, which has a mass of 20 kg. He pushes the mower with a force of 45 N directed at an angle of 41° down from the horizontal direction.
a) Draw a free body diagram showing the forces acting on the mower.
b) Solve Newton's Second Law; determine the acceleration of the mower and the value of any unresolved forces in the problem.
c) Calculate the work that Mike does on the mower each time he pushes it 9.1 m across the yard.