14. In towns and cities, the speed limit is 60 km-hr-1. The length…
Question Answered step-by-step 14. In towns and cities, the speed limit is 60 km-hr-1. The length… 14. In towns and cities, the speed limit is 60 km-hr-1. The length of the average car is 3.5and the width of the average car is 2 m. In order to cross the road, you need to beable to walk further than the width of a car, before that car reaches you. To cross safely,you should be able to walk at least 2 m further than the width of the car (4 m in total),before the car reaches you.(a) If your walking speed is 4 km-hr-“, what is your walking speed in m-s-1?(b) How long does it take you to walk a distance equal to the width of the average car?(c) What is the speed in m-s-1 of a car travelling at the speed limit in a town?(d) How many metres does a car travelling at the speed limit travel, in the same timethat it takes you to walk a distance equal to the width of car?(e) Why is the answer to the previous question important?(f) If you see a car driving toward you, and it is 28 m away (the same as the length of 8cars), is it safe to walk across the road;(8) How far away must a car be, before you think it might be safe to cross? How manycar-lengths is this distance?15. A bus on a straight road starts from rest at a bus stop and accelerates at 2 m-5-2 until itreaches a speed of 20 m-5-1. Then the bus travels for 20 s at a constant speed until thedriver sees the next bus stop in the distance. The driver applies the brakes, stopping thebus in a unitorm manner in 5 5(a) How long does the bus take to travel from the first bus stop to the second bus stop?(b) What is the average velocity of the bus during the trip? Science Physics PY 211 Share QuestionEmailCopy link Comments (0)
