Feet per second equal in miles per hour.

Question

Ok, so my compound bow at 60 pounds of draw will send my arrow out at 550 feet per second. What does that equal in miles per hour? Thanks

Answer 1

So this question will just require a simple dimensional analysis of the 550 feet/second, the 60 pounds of draw appears to be irrelevant info!

Beginning with your (550 feet/1 second) you'll multiply by (1 mile/5280 feet) and then (3600 seconds/1 hour).

Therefore, the units of feet and seconds can be respectively cross-canceled, leaving you to compute (550 x 3600)/5280 with the desired units of miles/hour. After crunching the numbers, your answer should look something like 375 miles/hour.