P2207_fall10_lecture7

# P2207_fall10_lecture7 - = A(150 mi/h B-150 mi/h C-150...

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A. Aim above B. Aim at C. Aim below
A. Aim above B. Aim at C. Aim below

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Today: Projectile motion What is the best angle to throw a javelin at for maximum horizontal reach? The zookeeper/hunter and the monkey… Relative motion

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Water Fountains: Projectile Motion (not ideal)

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An object is thrown on flat ground at some angle with respect to the horizontal. The object rises to a vertical height y max before returning to the ground. During its flight, how does the time the object spends with y>y max /2 compare with the time it spends with y<y max /2? A. More time in lower part. B. The same C. More time in upper part.

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“He has great hang time…”

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Relative Motion:
2 relative to 1

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Unformatted text preview: = ? A. (150 mi/h) B. (-150 mi/h) C. (-150 mi/h) + (450 mi/h) D. (150 mi/h) + (- 450 mi/h) E. (-150 mi/h) + (- 450 mi/h) i j Two airplanes are flying along headings that form a right angle. Plane 1 heads due south at 450 mi/h . Plane 2 heads due west at 150 mi/h . What is the velocity of Plane 2 relative to Plane 1 ? I.e., what is the apparent velocity of Plane 2 as viewed from the reference frame of Plane 1 ? (Take pointing E and pointing N.) i i i i i j j j v N W E S v 1 relative to 1 =0 Reference Frame: Plane 1 (as viewed from plane 1) -v 1 v 2 v 2 relative to 1 = v 2 -v 1 v 2 relative to 1...
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P2207_fall10_lecture7 - = A(150 mi/h B-150 mi/h C-150...

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