What total energy does weightlifter expend on lifting

Reference no: EM13341255

A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 41kg barbell straight up from chest height to full arm extension, a distance of 0.45m.

Part A: How much work does the weightlifter do to lift the barbell one time?

Part B: If the weightlifter does 23 repetitions a day, what total energy does she expend on lifting, assuming a typical efficiency for energy use by the body?

Part C: How many 500 Calorie donuts can she eat a day to supply that energy?

Reference no: EM13341255

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