Example. Required the time a body will take in falling through 402.08 feet of space.
√402·08 = 20·049, and 20·049 ÷ 4 = 5·012. Ans.
5.—The Velocity being given, to find the Space fallen through.
Divide the velocity by 8, and the square of the quotient will be the distance fallen through to acquire that velocity.
Example. If the velocity of a cannon ball be 660 feet per second, from what height must a body fall to acquire the same velocity?
660 ÷ 8 = 82·5² = 6806·25 feet. Ans.
6.—To find the Time, the Velocity per second being given.
Divide the given velocity by 8, and one-fourth part of the quotient will be the answer.
Example. How long must a bullet be falling, to acquire a velocity of 480 feet per second?
480 ÷ 8 = 60 ÷ 4 = 15 seconds. Ans.