1. The problem statement, all variables and given/known data A red ball is thrown down with an initial speed of 1.3 m/s from a height of 26 meters above the ground. The force of gravity due to the earth results in the balls each having a constant downward acceleration of 9.81 m/s2. What is the speed of the red ball right before it hits the ground? 2. Relevant equations x = 26 - 1.3t - 4.905t^2 3. The attempt at a solution I get how to do this problem, but I wasn't able to get the correct answer the first time when I did it completely mathematically. Can someone check where I'm going wrong in this work? We need to find the time that the ball hits the ground --> set x = 0 0 = 26 - 1.3t - 4.905t^2 -26 = -1.3t - 4.905t^2 -26 = (-1.3 - 4.905t)*t t = 0, -4.905t = -24.7 t = 5.03 seconds I don't know where I'm going wrong to get that t = 5.03 seconds, when the answer is 2.17 seconds (by using a calculator and plotting the zeroes). Is it wrong to solve the quadratic like this when solving for the roots?