Question: A laboratory animal exercised on a treadmill that was connected to a weight of mass 275 g through a pulley. The work done by the

A laboratory animal exercised on a treadmill that was connected to a weight of mass 275 g through a pulley. The work done by the animal raised the weight through 1.01 m. At the same time, the animal lost 7.8 J of energy as heat.

(a) Disregarding any other losses and treating the animal as a closed system, what was the change in internal energy of the animal?

(b) What would the change be if the experiment took place in a space station with zero gravity rather than on Earth?

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