well, the normal force has to overcome the weight of the mower, mg, plus the downward force of pushing, which is 82Cos45.
add them
A person pushes a 11.0 kg lawn mower at constant speed with a force of 82.0 N directed along the handle, which is at an angle of θ = 45.0° to the horizontal.Calculate the normal force exerted vertically upward on the mower by the ground.
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