It is 6.00 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10.0 km/hr (which uses up energy at the rate of 700 W), or you could walk it leisurely at 3.00 km/hr (which uses energy at 290 W).
(a) Which choice would burn up more energy?
(b) Why is it that the more intense exercise actually burns up less energy than the less intense one?
(c) How much energy (in joules) would it burn?