How many hours would you have to work at an activity of 1000 Joules per second to lose 10 kg Physics Question?

Answer 1

If this is about the mass-equivalent of energy, you need to do the following: convert the 10 kg to the equivalent energy in joules, using the formula e = m times c squared; then divide the energy you get by 1000 joules, to find how many seconds it will take you. To convert that to hours, divide the result by 3600 (since there are 3600 seconds in an hour).

The "physics" answer above is not the biological answer because (wild guess) a pound of fat comes from 3000 calories. There is a lot of extra matter needed to support the energy in a person.

Answer 2

Biochemically speaking, a kilogram of fat (tissue) represents about 32,000 kilojoules. So you'd need to work about 320,000 seconds at an expenditure of 1000 joules per second to work off the energy in 10 kg of body fat. That's a little under 89 hours.