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## Homework Statement

Jack and Jill are maneuvering a 3570kg boat near a dock. Initially the boat's position is [PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char68.png2,0,9[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char69.pngm [Broken] and its speed is 4.6m[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmmi10/alpha/144/char3D.pngs. [Broken] As the boat moves to position [PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char68.png12,0,0[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char69.pngm, [Broken] Jack exerts a force of [PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char68.png-80,0,290[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char69.pngN, [Broken] and Jill exerts a force [PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char68.png0,240,0[PLAIN]https://s3.lite.msu.edu/adm/jsMath/fonts/cmsy10/alpha/144/char69.pngN. [Broken]

How much work does Jack do?

WJack=

**-3410 J**

How much work does Jill do?

WJill=[/B]

How much work does Jill do?

WJill=

**0 J**

The second part of the question asks... Which person exerted a force perpendicular to the displacement of the boat?

a) Neither Jack nor Jill.

b) Both Jack and Jill.

c) Jill

d) Jack.

I was able to find the Work correctly but not I am just having a little trouble with the second part.The second part of the question asks... Which person exerted a force perpendicular to the displacement of the boat?

a) Neither Jack nor Jill.

b) Both Jack and Jill.

c) Jill

d) Jack.

I was able to find the Work correctly but not I am just having a little trouble with the second part.

## Homework Equations

W=Fd[/B]

## The Attempt at a Solution

**At first, I thought it was Jack since Jack is the only person exerting Work. But then I thought Jill because she's exerting force, but just in the wrong direction (perpendicular?) so her work is 0. I only have one shot at this, is my reasoning ok for saying its Jill?**[/B]

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