A student eat a dinner containing 8.0 * 10 of energy. He wishes to do an equivalent amount of work in a nearby gym by lifting a 6 kg object how much time must he raised the objects to expand this much energy? Assume that arises is a distance of 2.0 m each time raise to power 6
8.0 * 10 of energy
I have no idea. Perhaps 8.0 * 10^n JOULES ????
if so, what is n?
Anyway I will call it E
weight = 6 kg * 9.81 m/s^2 = 58.9 Newtons
work to lift 2.0 m = 58.9 * 2 = 118 Joules
so answer is E / 118
maybe 8.0 *10^6 Joules ????
800 * 10^4 /118 = 6.78 *10^4 = 67,800 times