a ball rolls horizontally off a table of height 1.4m with a speed of 4m/s. how long does it take the ball to reach the ground?

This is the answer the answer was on google

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