A working boy pushes a 15kg lawnmower at a constant speed with force of 90.0N directed along the handle which is at an angle of 30° below horizontal. a.) calculate the friction force the boy is overcoming . b.) calculate the lower reaction force on the mower from the ground. c.) calculate the coefficient of friction between the mower wheels on the ground. d.) calculate how hard the boy would have to push on the handle to give the mower acceleration of 0.80 m/s^2.

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