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How much work is done by a 100W engine in 120s? P = W/t

Question 15 options:

120 J


12,000 J


1200 J


.833 J

Respuesta :

For this case we have that by definition, physical power refers to the amount of work done for a unit of time.

So:

[tex]P = \frac {W} {t}[/tex]

Where:

W: It's the work

t: It's time

The power units are in [tex]\frac {Joules} {s} = Watts[/tex]

So, according to the problem data we have:

[tex]P = 100W\\t = 120s[/tex]

Clearing the work of the formula:

[tex]W = P * t\\W = 100 * 120 = 1200[/tex]

Thus, the work is 1200 joules.

Answer:

Option C