(Answered) A mass ofnbsp0077nbspkg hangs from a vertical spring in the

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A mass of 0.077 kg hangs from a vertical spring in the lab room. You pull down on the mass and throw it vertically downward. The speed of the mass just after leaving your hand is 5.00 m/s.

(a) While the mass moves downward a distance of 0.12 m, how much work was done on the mass by the Earth? Include the appropriate sign.

Work done by Earth = J

(b) At the instant in part (a) when the mass has moved downward a distance of 0.12 m, the speed of the mass has decreased to 3.00 m/s. How much work was done on the mass by the spring? Include the appropriate sign.

Work done by spring = J

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