[填空题]
Consider the street pattern svu /3ecqya-7yhown in Fig. 2–42. E hm,s)qosybsok 1/w7mp(x )de e7zz:- ach intersection has a traffic signal, and the speed limit issk:szx wo ze7,7 d1 b)-/mm)hpq oeys( 50 km/s . Suppose you are driving from the west at the speed limit. When you are 10 m from the first intersection, all the lights turn green. The lights are green for 13 s each.
(a) Calculate the time needed to reach the third stoplight. Can you make it through all three lights without stopping?
(b) Another car was stopped at the first light when all the lights turned green. It can accelerate at the rate of $2.0 m/s^2$ to the speed limit. Can the second car make it through all three lights without stopping?
