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March 29, 2015

Homework Help: Math

Posted by Zach on Monday, May 6, 2013 at 10:05am.

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*80=60
1/4*60=45
1/4*45=33.75
1/4*33.75=25.31 for the speed

Or I need to use some kind of formula? Please help me.

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