What happens when an iron nail is exposed to air and water? (1) (a) Iron undergoes oxidation to form ferrous
(b) Air and moisture convert iron to form rust
(c) Both a and b
(d) None of the above​

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

The actual answer is c force stays the same while direction changes