1. Science w/ Ms. Hendryx 9/29/11

2. + =

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

4. 6 8 c=?

5. 12 c=? 5 + = 2 -2 + = Combining concepts: vectors and Pythagorean Theorem

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

7. 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

8. 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