Question

A girl with 400 N force runs in a park with a length of 5m. The girl takes 10 seconds to get the end of the park. What is the power done by the boy on this activity?

Answer 1

• Force=400N
• Displacement=5m

`\\ \sf\longmapsto Work\:Done=Force* Displacement`

`\\ \sf\longmapsto Work\: Done=400(5)`

`\\ \sf\longmapsto Work\:Done=2000N`

• Time=10s

Now

`\\ \sf\longmapsto Power=(Work\:Done)/(Time)`

`\\ \sf\longmapsto Power=(2000)/(10)`

`\\ \sf\longmapsto Power=200W`

Answer 2

200W

Step-by-step explanation:

First let's find the work done

`work \: \: = \: \: force * displacement \\ = 400 * 5 \\ = 2000J \\`

Now let's find the power

`power = (work)/(time) \\ = (2000J)/(10s) \\ = 200w`

hope this helps you.

Please let me know if you have any other questions :-)