Question

Many states have banned texting while driving because it is dangerous. Suppose you are driving 65 mph and you take your eyes off the road for four seconds. How many feet will you travel in that time. What is the dimensional analysis

Answer 1

65 mph means in 1 hour you drive 65 miles.

To find out how many feet you drive in 1 second you need to convert the above in terms of feet and secs

1 hour = 60 minutes and 1 minute has 60 secs

So 1 hour has 60* 60 secs = 3600 secs.

1 mile - 5280 feet

65 miles = 65*5280 feet

So in 3600 secs you are driving 65 * 5280 feet