A 50.0 kg shell is fired from a cannon on Earth's surface to a maximum height of 400 m. What is the

potential energy?

a 196,000

b 170,000 J

C 185,000 J

d 190,000 J

So since the snail is moving at 3.6  miles per hour you multiply by 5280 to change it into feet per hour. so you get 36*528 ft per hour. since there are 3600 seconds in an hour, you divide 36*528 by 3600. so simplifying we get 528/100 which is 5.28 ft per second