Question

It is estimated that a driver takes, on average, 1.5 seconds from seeing an obstacle to reacting by applying the brake or swerving.

How far will a car, traveling at 65 miles per hour, travel in feet before the driver reacts to an obstacle? Round answer to the ones place.
HELP DUE TONIGHT

Answer 1

Answer: We know that 60 mph = 88 feet per sec (this can be shown easily enough).

Then we have a proportion:

60%2F88+=+85%2Fx

and we cross-multiply to get

60x = 7480

x = 124.7 feet per sec

Now multiply that by 1.5 sec and get

187 feet

(This is not realistic...the average alert driver reacts in about 0.15 seconds, not 1.5)

So answer 187 feet

Explanation: