A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 43 kg barbell straight up from chest height to full arm extension, a distance of 0.50 m.
Part A: How much work does the weightlifter do to lift the barbell one time?
Part B: If the weightlifter does 24 repetitions a day, what total energy does she expend on lifting, assuming a typical efficiency for energy use by the body (25%).
Part C: How many 420 Calorie donuts can she eat a day to supply that energy?
A weightlifter works out at the gym each day. Part of her routine is to lie...
A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 45 kg barbell straight up from chest height to full arm extension, a distance of 0.52 m . How much work does the weightlifter do to lift the barbell one time? 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 (25%)....
A weightlifter works out at the gym each day. Part of her routine is to lie on her back and lift a 43 kg barbell straight up from chest height to full arm extension, adistance of 0.54m . How much work does the weightlifter do to lift the barbell one time? If the weightlifter does 17 repetitions a day, what total energy does sheexpend on lifting, assuming a typical efficiency for energy use by the body? How many 400 Calorie...