A rubber ball is thrown straight down from a height of 244 feet at speed of 80 feet per second. If the ball always rebounds with one-fourth of its impact speed, what will be the speed of the ball the third time it hits the ground?
My Answer is:
1/4*33.75=25.31 for the speed
Or I need to use some kind of formula? Please help me.
Math - MathMat, Monday, May 6, 2013 at 10:17am
I am not sure what the formula is, but I can tell you that 1/4 multiplied by 80 is not 60. It would be 20. 60 is 3/4 of 80.
Math - Zach, Monday, May 6, 2013 at 10:58am
Yes what I meant is that it decreased 1/4 of every its impact, so therefore the answer would be 60 mph after first impact.