Science w/ Ms. Hendryx 9/29/11. + = Pythagorean Theorem: a 2 + b 2 = c 2 a b c.

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Presentation transcript:

Science w/ Ms. Hendryx 9/29/11

+ =

Pythagorean Theorem: a 2 + b 2 = c 2 a b c

6 8 c=?

12 c=? 5 + = = Combining concepts: vectors and Pythagorean Theorem

v x =8 v=10 v y =? + = v x =8 v=10 v y =? -= OR! Now apply it to physics…

4 of my friends in college pushed a broken couch off of the 6-meter apartment balcony rail (being sure no one was below). They shoved it so that it had v x0 of 2 m/s coming off the balcony. What was the total velocity v of the couch as it hit the ground? v x0 = 2m/s

m = 5 kg F=75 N FyFy FxFx FgFg F n = 25 N F f = 2 N ΔxΔx A block is being pulled along using a rope. Use the force diagram below. Find the total force acting on the block (F x ). Find the block’s acceleration. Notes: there is no vertical motion, so F n +F y = F g. Assume acceleration due to gravity is -10m/s 2 to find F g. F=75 N