# EP Chap4 - Chap 4 Motion in two and three dimensions[sec...

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1 Chap 4 Motion in two and three dimensions [sec. 4.7 will be covered later] Note – this is an outline of the lecture, print this and take notes on it in lecture It is not the and take notes on it in lecture. It is not the complete lecture. You should attend lecture to get the complete notes Images taken from Halliday/Resnick/Walker, Fundamentals of Physics, 7 th Edition, John Wiley and Sons Inc., by permission. Homework hints Be sure to show your x, y axes for each problem 26.a) Find the time its takes for the ball to reach the x position of the net. Now find the height of the ball. Is this height greater than the net height? 33. a)Know that . . So need to find the initial and final y velocities to find h . () ( ) ( ) gh h g y y a v v y y 2 2 2 0 2 0 2 = = = Position and displacement Position: ( ) ( ) k ˆ m 5 j ˆ m 2 i ˆ m 3 e.g. k ˆ j ˆ i ˆ + + = + + = r z y x r v v Displacement: k ˆ j ˆ i ˆ 1 2 z y x r r r Δ + Δ + Δ = = Δ v v v Projectile motion y j ˆ i ˆ 0 0 y x o v v v + = v Projectile launched with initial velocity o o oy o

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EP Chap4 - Chap 4 Motion in two and three dimensions[sec...

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