# How to Solve Quadratic Equation Speed, Distance & Time Problems

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Solving quadratic equations for speed, distance and time is something you might need to do if measuring a dropping ball. Solve quadratic equations for speed, distance and time with help from an expert in computers, with two degrees in both Computer Science and Applied Mathematics from the New Jersey Institute of Technology, in this free video clip.

Part of the Video Series: Math Skills
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## Video Transcript

Hi, my name is Stefan. Today, I'm going to be speaking on how to solve a quadratic equation with speed, distance and time. OK let's say we're dropping the ball, we have a ball and we're letting go, we're dropping it and we want to see where the ball is going to be in let's say one second. So let us use the physics formula displacement d equals Vit plus one half at squared. So since we're releasing this ball our initial velocity is going to equal zero and we want to find where does it go after one second so t is going to be equal to one. And we know g is which is our acceleration, a is 9.8. OK now let's just plug the numbers in so we get zero times one plus one half 9.8 times t which is one squared. And we solve this we get OK that's zero plus 4.9 times one and so d is equivalent to 4.9. That's how far the ball went down after one second. 4.9.

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