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Unformatted text preview: the video below. You will be as k ed to us e y our k nowledge of phy s ic s to predic t the outc ome of
an ex periment. Then, c los e the video window and ans wer the ques tions at right. You c an watc h the video
again at any point. Par t A
Cons ider the video demons tration that y ou jus t watc hed. W hic h of the following c hanges c ould
potentially allow the ball on the s traight inc lined (y ellow) trac k to win? Ignore air res is tanc e.
Se le ct a ll tha t a pply. Hin t 1. How to approach the problem
Ans wers A and B involve c hanging the s teepnes s of part or all of the trac k . Ans wers C and D
involve c hanging the mas s of the balls . So, firs t y ou s hould dec ide whic h of thos e fac tors , if
either, c an c hange how fas t the ball gets to the end of the trac k . ANSW ER: A. Inc reas e the tilt of the y ellow trac k .
B. Mak e the downhill and uphill inc lines on the red trac k les s s teep, while k eeping the total
dis tanc e traveled by the ball the s ame.
C. Inc reas e the mas s of the ball on the y ellow trac k .
D. Dec reas e the mas s of the ball on the red trac k . Correct
If the y ellow trac k were tilted s teeply enough, its ball c ould win. How might y ou go about
c alc ulating the nec es s ary c hange in tilt? Score Summary:
Your s c ore on this as s ignment is 99.4% .
You rec eived 7.95 out of a pos s ible total of 8 points ....
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This homework help was uploaded on 03/08/2014 for the course PHYS 102 taught by Professor Atillaaydınlı during the Spring '10 term at Bilkent University.
- Spring '10