2006-09-06 18:02:35 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Power is the rate of doing work.
P = W/t
where "W" is work done, and "t" is the time taken.
2006-09-06 18:08:27 · answer #1 · answered by don.giovanni 3 · 1⤊ 1⤋
Suppose that there are two 5kg stones on the ground.
I lift the 10 kg to a height of one meter; the work done by me is mgh; 10 x 10 x 1 = 100 joule.
I do it in one second then the power is work done per unit time = 100 joule per second = 100 watt.
Another one is doing the same thing but in two times; that is he first lifts one 5 kg in one second and then the other 5 k in the next second.
The total work done is the same as 100 joule but this is done is 2 second. There fore the power of the other man is 100 / 2 = 50 joule per second or 50 watt.
2006-09-06 21:51:17 · answer #2 · answered by Pearlsawme 7 · 2⤊ 0⤋
I agree with Don G. P = W/t
Work is usually defined as a force moving through a distance
So power would be the rate at which the work gets done
2006-09-06 18:19:05 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Power is the amount of work per unit time. Example: watt is a unit of power; watt-hour is a unit of work.
2006-09-06 18:36:02 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Work is what happens when energy changes form (the work energy equivalence principle) Work is measured in Joules just like energy.
Power is the rate at which work is being done (or Joules are being used)
Doug
2006-09-06 18:11:50 · answer #5 · answered by doug_donaghue 7 · 1⤊ 0⤋
Power is written on your iron and how long you use is work (energy) can be read in watt meter in front of your house.
2006-09-07 04:51:12 · answer #6 · answered by dwarf 3 · 0⤊ 0⤋
Power can be defined as rate work with respect to time,,
Work is defined as displacement with respect to time
2006-09-06 18:10:17 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Power is what it takes to do work.
2006-09-06 18:10:54 · answer #8 · answered by Anonymous · 0⤊ 4⤋
power can be stored, work can't. Power can be used to perform work. i.e. power stored in a battery (chemical energy) can be used to perform work such as lighting a bulb in a flashlight.
2006-09-06 18:04:47 · answer #9 · answered by Rare Indigo 4 · 0⤊ 2⤋
work is the action...power is the result
2006-09-06 18:03:44 · answer #10 · answered by Anonymous · 0⤊ 3⤋