1/30 Physics class update and homework due 2/6

Hi folks,

Today we continued our investigation into energy and work. We have begun to take a look at simple machines and how they relate to the concept of work. We used pulleys to discover the inverse relationship between distance and force.

Most of today was spent reviewing problems and doing our pulley lab so there will be no recording this week.

For homework this week:



Read the pulley chapter in the book.



Also, answer the following questions.



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



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



3. 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?



4. 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?



5. 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?