08_30_Acceleration

08_30_Acceleration - What does the final velocity have to...

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Physics 211 8/30 HW Handout Name_______________________ Fall 2002 Acceleration Due Thursday 9/5 1) A ball rolls from rest down a ramp and onto a level section. The ball speeds up on the ramp and moves at constant velocity on the level section. The times when the ball is at various positions are given on the diagram. The ramp (incline) section is 10m long. The diagram is not to scale. a) What is the average velocity of the ball while it is on the incline? Show your reasoning. b) What is the velocity of the ball (magnitude and direction) at the instant the ball reaches the bottom of the ramp? Explain. Hint:
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Unformatted text preview: What does the final velocity have to be so that when averaged with the initial velocity (zero) you get the answer to part a)? c) What is the acceleration (magnitude and direction) while the ball is on the ramp? Show its direction accurately with an arrow. Use ∆ v to find a. d) How long is the level section? Here the ball rolls with constant velocity. Show your reasoning. e) How long would the sloped part of the ramp have to be (same angle, just longer) so that the ball takes twice the time (8 seconds) to get to the bottom of the ramp? t = 4 s t = 7 s t = 0 s 10 m v = 0 m/s...
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This note was uploaded on 12/21/2010 for the course PHYS Physics 21 taught by Professor Larrywatson during the Fall '08 term at North Dakota.

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