The athlete has a power of 800 W and does 10 kJ work.How long has the athlete been running for?Time = _____ s

Question

The athlete has a power of 800 W and does 10 kJ work.

How long has the athlete been running for?

Time = _____ s

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Solution

To find the time, we need to use the formula for power, which is work divided by time. We can rearrange this formula to solve for time, which gives us time = work / power.

The work done is given as 10 kJ, but we need to convert this to the same units as power, which is given in watts (W). 1 W = 1 J/s, so we need to convert kJ to J.

1 kJ = 1000 J, so 10 kJ = 10,000 J.

Now we can substitute the given values into the formula:

time = work / power time = 10,000 J / 800 W time = 12.5 s

So, the athlete has been running for 12.5 seconds.

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The athlete has a power of 800 W and does 10 kJ work.How long has the athlete been running for?Time = _____ s

Question