if i do some work then i take energy or release it????????????

Answer 1

Work done by you is released. Work done on you is absorbed.

Answer 2

You use up energy to do work. Work = fd; where f = net force in the direction of d, the distance an object is moved.

EXAMPLE: You are pushing a weight of 980 Newtons (N) of gold bars out of the bank vault you just robbed. You want to get away around the city block corner in 2 minutes; that corner is 100 meters from the vault. The coefficient of sliding friction between the gold bars and the sidewalk you are pushing them over is k = .1 After cracking the very heavy bank vault, you have about 10,000 N-m of energy (Joules) left to spare; after that you collapse on the street exhausted. So the question is: can you get around that street corner with your stash of gold bars before the cops show up in two minutes?

The work you need to use (energy you take) is W = fd = kN d = .1X 980 X 100 = 9800 N-m (Joule) of energy. So you have the spare energy to do it since you have 10,000 N-m in expendable energy left. But do you have the power, which is just expended energy (work) over some time interval. P = W/t; so to whisk those gold bars around the corner in two minutes, you need to expend power = P = W/t = 9800/(2 X 60) = 9800/120 ~ 80 N-m/sec (Joule/sec) of power. Can you do it, or will you get caught?

Hint: a Joule/sec is a watt of electrical power; so you have to use up the equivalent of an 80 watt light bulb to move that gold around the corner in time to not get caught. Also, the human adult at rest burns up the equivalent of a 60 watt light bulb. So you need an addition 80 watts of power over that 60 watt metabolic at rest rate.

Answer 3

you take energy. when u work u absorb energy. click on the link and read on.

Answer 4

it will totally work!

i usually take my energy before i work though, they are the yellow pills from the gas station with the picture of the cartoon hornets on the package..