Worker Sim Pulma Sheen: Solving a Pulley Problem

[Just_enough]

Repost since it was removed from double questions.
1. Homework Statement
Worker Sim Pulma Sheen uses a system of pulleys to lift a 5000 N box 2 meters while pulling on the rope with a force of 500 N. This means the worker had to pull how much rope from the pulley system?
a) 0.2m. b) 2m c) 5m d) 10m e) 30m

Homework Equations

W = F*D?

The Attempt at a Solution

[/B]
I tried to find the work of the obj then set it equal to the work done on the person (pulling) and divide by force to find distance, and got 20... is this not the right equation?

 

[Doc Al]

I tried to find the work of the obj then set it equal to the work done on the person (pulling) and divide by force to find distance, and got 20... is this not the right equation?

You are correct.

 

[Just_enough]

You are correct.

what equation should I use then?

 

[Doc Al]

what equation should I use then?

Your analysis is correct as is. You used the correct equation. The correct answer is not among the choices--not your fault.

Where did you get the problem?

 

[Just_enough]

Your analysis is correct as is. You used the correct equation. The correct answer is not among the choices--not your fault.

Where did you get the problem?

Oh haha, thought you mean I am am correct on not being correct. I got it from my physics teach for a home retake test on our quiz...

 

[Doc Al]

I got it from my physics teach for a home retake test on our quiz...

Maybe you'll get extra credit for pointing out his error.

 

[Just_enough]

Maybe you'll get extra credit for pointing out his error.

I wish, it's hard to get in touch with him.