ex_1_P180_S2010[1]

# ex_1_P180_S2010[1] - for the car to go from a complete stop...

This preview shows page 1. Sign up to view the full content.

JF' NAME :) q Lvy/u/r/ PHYS 180 Spring 2A1O Feb. 3,2010 Red light, green light A car and a train move together along straight, parallel paths with the same constant cruising speed vo. At t=0 the car driver notices a red light ahead and slows down with constant acceleration -a0. Just as the car comes to a full stop, the lightimmediately turnsgreen, and the car then accelerates back to it original speed vo with constant acceleration ao. During the same time interval, the train continues to travel at the constant speed vo. (A) How much time tr does it take for the carto come to a complete stop? Express tr in tCrMS Of VO ANd AO. DRAWA BOX AROUND YOUR ANSWER. 4f(+):4/oo + (-4.)t Vr(t,\ ? o (B) Howmuch timetedoes it take for the car to go from a complete
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: for the car to go from a complete stop to its original cruising speed? Express your answer tz in terms of vo and ao. DRAW A BOX AROUND YOUR ANSWER. /tt-1.(b Ordut 4I (1 ,)= 4Ju = Qu 1, / A A'to €;.- T" h a(€ {r?d, (C) The train does not stop at the stoplight. How far behind the train is the car when the car reaches its original cruising speed again? Fxpress the separation distance in terms of ao and vo. Your answer shoufd be positive. DRAW A BOX AROUND YOUR ANSWER. Vr-Vo rtW| oF Vecrrlnt Fc-c; Vb trr(r) = KCTrLrttu) 5 l/o Vu /^ 1. 4o t TVu' Qo rtWft il: Th.ru (rLi4r,6 ts F L^&t l/ r 4 /r t |tvv = u* 6u ( ( Uvl ;l {c, /,? K"= GTqL TVuL 7 u6 lL' Tr vu' ;, I Y cnn' K \./- -# (\--I {Ltl-t*...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern