how do i turn power into watts or joules?

Question

this is the question: Calculate teh amount of power used by a person who is experiencing a force of 145 lbs and is moving 60 meters in 10 seconds

PLEASE show work

Answer 1

Power is measured in Watts. Watts are a measurement of power. Work is also defined as Power x time. So W = P x t So if my A/C unit uses 3000 watts for 40 seconds:

3000 W x 40 s = 120,000 J

It expended 120,000 J of energy.

Remeber the units MUST all be SI. I.e. If you want Joules, you must use Watts for power, and seconds for time.

EDIT: For this problem you must convert 145 lbs to Newtons multiply by the 60 meters and divide by 10 seconds. In other words (numbering equations by (1), (2), etc.)

(1) P = W / t and
(2) W = F x d

then substituting for W in eq. (1) gives

P = (F x d) / t

So

((644.992134 Newtons) * (60 meters)) / (10 seconds) = 3869.9528 Watts

or about 3870 W

Answer 2

A watt is a unit of power. A joule is a unit of energy.

1 watt equals the intensity of 1 joule of power per second of time.

For example, a 100 watts light bulb is spending 100 joules of energy per second.

Answer 3

The units of power is watt or joules - second
P=Wxt=F.sxt ie forcex distancex time

Answer 4

you can only ,as far as I know, only turn watts of power to joules thru a defribralator and the joules increase with every discharge of the paddles till it reaches its max capacity.

Answer 5

power is watts