# Question

A 2.00-kg mass is attached to a vertical spring with a spring constant of 250 N/m. A student pushes on the mass vertically upward with her hand while slowly lowering it to its equilibrium position.

(a) How many forces do nonzero work on the object: (1) one, (2) two, or (3) three? Explain your reasoning.

(b) Calculate the work done on the object by each of the forces acting on it as it is lowered into position.

(a) How many forces do nonzero work on the object: (1) one, (2) two, or (3) three? Explain your reasoning.

(b) Calculate the work done on the object by each of the forces acting on it as it is lowered into position.

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