PLEASE HELP. Brandon uses a ramp of length 8cm to load boxes onto the tray of a flatbed truck. He pushes a box of mass 120kg up the ramp with a force of 200N. The box moves through a vertical distance of 0.8m. Gravitational field strength, g= 10N/kg.
a. Calculate the change in gravitational potential energy of the box.
b. Calculate the work done by the 200N force.
d. Explain why the answers to a and b are different.
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