An electric fan has a power output of 60 W. How much work is done if the fan operates for 120 s?

1 Answer
Jun 3, 2016

Answer:

#7000J#

Explanation:

Recall the formula for power:

#color(blue)(|bar(ul(color(white)(a/a)P=W/(Deltat)color(white)(a/a)|)))#

#ul("where")#:
#P=#power
#W=#work
#Deltat=#change in time

To determine the work done, you need to rearrange the formula and solve for #W#.

Rearranging the formula,

#W=PDeltat#

Plug in the values.

#W=(60W)(120s)#

Solve.

#W=7200J#

Accounting for the appropriate number of significant digits,

#W~~color(green)(|bar(ul(color(white)(a/a)7000Jcolor(white)(a/a)|)))#