a) f * d = 1500 N * 3 m = 4500 J
b) 4500 J - m g h = 4500 J - (350 kg * 9.8 m/s^2 * .81 m)
A physics student uses a ramp to slide a 350 kg piano onto the back of a pickup truck. The box on the back of the truck is 81 cm above the ground and the planks are 3 m long. An average force of 1500 N is required to slide the piano up the planks.
a) Determine the work done in loading the piano.
b) Calculate the work done by friction.
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