2-3 physics update and homework due 2/10

Hi folks,

Today we continued our investigation into simple machines and their relation to work. We did some work with pulleys and discovered the inverse relationship between distance and force.

For homework this week:

Read the pulley chapter in the book.

Take a look at the enclosed .pdf and do all the questions at the end.

Also, answer the following questions.

1. With the pulleys, how did work out relate to work in?

2. With the levers, did work out relate to work in? It should have. So what wasn't measured that caused work out to not relate to work in in the same way as the pulleys?

3. What relationship did force have in regards to distance as you worked with the pulleys?

4. As you increased the number of pulleys, what effect did that have on the effort force? What effect did it have on the effort distance?

5. a. If you were lifting a load that required a force of 10N with one pulley, what effort force would be required?
b. Same question, but now you're using 2 pulleys?
c. How about 10 pulleys?

6. a. If you were lifting that load 1 meter, what would the work in distance be for one pulley?
b. 2 pulleys?
c. 10 pulleys?