Traffic is moving at 30 mph on a street you plan to cross. How big of a gap n traffic should you have in each direction in order to cross the street? A) 50 feet B) Two-thirds of a block. C) One-half mile?

1 Answer
Nov 25, 2016

Answer:

I admit I completely invented this one but it intrigued me...

Explanation:

I considered that #30"mph"# corresponds to #44"ft/s"#

so that your car moving at this speed will travel the distance of #50 "ft"# in:

#50/44=1.1s#

considering this person very fit and...maybe to be Usain Bolt probably he can run #100m=328"ft"# in #10 "seconds"#

or #328/10=32.8"ft"# each second....

and in #1.1s# he will cover: #32.8*1.1=36.1"ft"#

Considering:

https://www.google.com.br/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjm6cytq8TQAhUGhZAKHUZeDdgQjB0IBg&url=http%3A%2F%2Fplannersweb.com%2F2013%2F09%2Fwide-neighborhood-street-part-1%2F&psig=AFQjCNEmukPqhEGqQ5FKLAJLJ4D9rqhqYQ&ust=1480178098160711

...#50"ft"# in each direction should be ok...