A boy throws a 1.5 kg rock upward. to do so the boy applies, Ask an Expert

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A boy throws a 1.5 kg rock upward. To do so the boy applies a constant 38.5 N force upwards on the rock from point a to point b. then the rock continues upward to it's maximum height at point c.

a) Calculate the work that the boy performs from point a to point b.

b) Calculate the work that the force of gravity performs from point a to point b.

c) What is the total work done on the mass?

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