A 58 kg woman athlete can generate a sustained specific power output of 5.0 W/kg. One training exercise is to push a heavy sled across the grass at a steady speed, which takes a horizontal pushing force of 152 N.

Part A What speed can she maintain for a sustained period of time? How much stored chemical energy will she "burn" in 10 minutes if her body is 25% efficient at converting chemical energy into mechanical energy? Calories are more familiar units than joules for thinking about the body's energy use. A useful conversion factor is 1 Cal = 4.2 kJ, where Cal is the abbreviation for a food calorie. How many calories does the woman burn during the 10 min workout?