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Mistytrotter
07.03.2020 •
Physics
Use these values: distance traveled is 30.0 km; time elapsed is 40.0 minutes; average power output is 370 watts. Determine the total energy expended by the cyclist, in kilojoules.
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Ответ:
Explanation:
It is known that the relation between power and work is as follows.
Power =![\frac{\text{work done}}{Time}](/tpl/images/0537/8283/e9f68.png)
As it is given that power is 370 watts and time is 40 minutes. First, we will convert minutes into seconds as follows.
= 2400 sec
Now, total power or energy is calculated as follows.
Power =![\frac{\text{work done}}{Time}](/tpl/images/0537/8283/e9f68.png)
=
= 888000 J
As 1 kJ = 1000 J. So, convert 888000 J into kJ as follows.
= 888 kJ
therefore, we can conclude that total energy expended by the cyclist is 888 kJ.
Ответ:
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