SOLUTION: The distance an object falls varies directly with the square of the time it spends falling. If a ball falls 78.4 meters after falling for 4 ​seconds, how far will it fall aft

Algebra ->  Expressions-with-variables -> SOLUTION: The distance an object falls varies directly with the square of the time it spends falling. If a ball falls 78.4 meters after falling for 4 ​seconds, how far will it fall aft      Log On


   



Question 1040419: The distance an object falls varies directly with the square of the time it spends falling. If a ball falls 78.4 meters after falling for 4 ​seconds, how far will it fall after 9 ​seconds?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
d=kt^2
78.4=k*16
k=78.4/16=4.9
d=4.9*9^2=4.9*81=396.9 meters