It is 7.00 km from your home to the physics lab. As part of your physical fitness program. you could run that distance at 10.0 km/hour (which uses up energy at the rate of 700W ), or you could walk it leisurely at 3.00 km/hour (which uses energy at 290 W).
Part A Which choice would burn up more energy?
Part B How much energy (in joules) would it burn?
Part C Why is it that the more intense exercise actually burns up less energy than the less intense one?