# 2-930 - WY/B Recitation Instructor(circle one Bolland...

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Unformatted text preview: WY/B/ Recitation Instructor (circle one): Bolland Barrett Hinton Marginean Merritt Peters Yong Zang QUIZ #2 April 8, 2008 20 points, 18 minutes SCORE Physics 131, Dongping Zhong, Spring 2008 Section: 12:30 am Name You may use some equations listed at the bottom. You need to show your work of (2) and (3) for full points. (1) [5 points] Which acceleration-versus-time graph on the right best matches the position-versus-time graph on the left? (a) (b) @ (d) X a a a a (2) [5 points] I throw a rock straight up and it reaches a maximum height of 50 m measured from the release point. (I must be stronger than I look.) How fast was the rock moving when I let it go? VF”..\/A~L: Zaak/ w 4234 .3 3) ”/5 (3) [10 points] A toy car on a track passes point A going to the right with speed 2.0 m/s. It passes point B, 5.0 m away, with speed 1.0 m/s still going to the right. Eventually the car returns to point A. What was the total time taken by the car for the round-trip? Assume l-D motion at constant acceleration. st = VI: + a. At sf = S: + VI: At + ‘/2 as (At)2 w. = Vi: + 2a.(S« '51) st - S. = ‘/2 (VI: + st) At ...
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