Chapter 4 Lecture

Chapter 4 Lecture - General Physics I Durig Lewis...

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General Physics I Durig Lewis
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Supplemental Instruction Tuesdays, 3:00 pm – 4:00 pm Wednesdays, 7:00 pm – 8:00 pm Fridays, 12:00 pm – 1:00 pm Yostina Bichay Hibbs, Room 220
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Two Dimensional Motion
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Survey A ball is thrown upward so that its path is a parabola as shown. Which arrow most nearly resembles the velocity vector at the top of the path (point A)? A a) b) c) d) e)
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Survey A ball is thrown upward so that its path is a parabola as shown. Which arrow most nearly resembles the acceleration vector at the top of the path (point A)? A a) b) c) d) e)
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Two Dimensional Motion
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Two Dimensional Motion Time y Time x
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Two Dimensional Motion A ball is thrown with a speed of 4 m/s at an angle of 30° above the horizontal. How far horizontally does the ball travel before striking the ground? v 0 = 4 m/s x y
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Two Dimensional Motion t a v v x x x + = 0 t v v x x x x ) ( 0 2 1 0 + + = 2 2 1 0 0 t a t v x x x x + + = ) ( 2 0 2 0 2 x x a v v x x x - + = t a v v y y y + = 0 t v v y y y y ) ( 0 2 1 0 + + = 2 2 1 0 0 t a t v y y y y + + = ) ( 2 0 2 0 2 y y a v v y y y - + =
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Two Dimensional Motion θ x y sin y v v θ = cos x v v = v
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Two Dimensional Motion A ball is thrown with a speed of 4 m/s at an angle of 30° above the horizontal. How far horizontally does the ball travel before striking the ground? 0 0 x m = ? x = Horizontal Vertical 0 4cos30 / x v m s = 0 4sin30 / y v m s = x v Don't Care = y v Don't Care = 0 0 y m = 0 y m = 2 0 / x a m s = 2 9.81 / y a m s = - t = ? t = v 0 = 4 m/s x y
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Two Dimensional Motion A ball is thrown with a speed of 4 m/s at an angle of 30° above the horizontal. How far horizontally does the ball travel before striking the ground? Vertical 0 4sin30 / y v m s = y v Don't Care = 0 0 y m = 0 y m = 2 9.81 / y a m s = - ? t = t a v v y y y + = 0 t v v y y y y ) ( 0 2 1 0 + + = 2 2 1 0 0 t a t v y y y y + + = ) ( 2 0 2 0 2 y y a v v y y y - + =
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Two Dimensional Motion A ball is thrown with a speed of 4 m/s at an angle of 30° above the horizontal. How far horizontally does the ball travel before striking the ground? Vertical
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This note was uploaded on 09/04/2008 for the course PHYS 201 taught by Professor Durig during the Spring '08 term at VCU.

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Chapter 4 Lecture - General Physics I Durig Lewis...

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