1 / 6

Work and Power

Work and Power. Practice calculations. Which is more work? Pushing against a building that doesn’t move with 1000 N of force OR Pushing against a table with 100 N of force and making it move 3 meters Which one feels like more work?. SUMMARY OF IDEAS (Work):.

noma
Download Presentation

Work and Power

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Work and Power

  2. Practice calculations • Which is more work? • Pushing against a building that doesn’t move with 1000 N of force OR • Pushing against a table with 100 N of force and making it move 3 meters • Which one feels like more work?

  3. SUMMARY OF IDEAS(Work): • Do not confuse getting tired with doing work. • You can get tired even when not doing work. • -If there is no movement from point a to point b, there is no work • -External work (physics) vs. • -Internal work (the effort in your body= biology) • -example: holding a book for a long time

  4. Practice calculations • Which is more work? • A: Using a 2 meter ladder (your force is about 600 N) OR • B: Walking 6 meters up stairs (your force is about 200 N)

  5. BUT HOW DOES IT FEEL? • Which one feels like more work? Ladder OR Stairs • Something to think about: • Would you put a ladder in your grandma’s house?

  6. SUMMARY OF IDEAS(Work): Would you put a ladder in your grandma’s house? -Power (amount of work done in a certain amount of time) -ladder is faster =more power -more power is more difficult for humans

More Related