March 31, 2009 Pick up a bellringer worksheet from the front cart (next to projector). After you complete the bellringer, get out your homework (Review.

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Presentation transcript:

March 31, 2009 Pick up a bellringer worksheet from the front cart (next to projector). After you complete the bellringer, get out your homework (Review of Notes 1: Work and Power)

Review of Worksheet 17 m 23N 23W 17J 5N 13N 81W 14.5 m 88 J .25N Circle the numbers that represent force. Draw a square around the numbers that represent distance. Underline the numbers that represent work. Double underline the numbers that represent power. 17 m 23N 23W 17J 5N 13N 81W 14.5 m 88 J .25N 11 s 21m 124 N 2.2 W 0 J

Review Questions How is power related to work? If it takes 100 N of force to move an object 10 meters, how much work is done? If you are holding a 1000-lb car engine over your head for 50 seconds, how much work is done?

Review Questions How much power is produced when 500J of work is done in 2 seconds? When 750J of work is done in 3 second? 600J in 4 sec? To produce more power, do you want to do work faster or slower? Why?

Goals To gather data to calculate work and power.

Your procedure must be approved by me BEFORE you are released! I will allow 4 groups in each stairwell at a time (total of 8 groups gone at a time). If you do not get to the lab today, you will do it tomorrow. HOMEWORK: Finish your book work packet (due tomorrow!)