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First Entry
A quadratic equation has to do with predicting the path of a projectile for afew reasons. One reason is because you can figure out how long the projectile is in the air. You can also figure out how far the projectile traveled using a quadratic equation. -
Quadratic Formula
The quadratic formula tells you where the x intercepts are at if ax2+bx+c=0. This formula has advantages over factoring because in certain equations, you can't factor because two numbers don't always equal the numbers you need them to equal. The 2 final x's at the end of all the math shows where the projectile crossed the x axis at. -
Projectile Formulas
The forward velocity is the initial velocity multiplied by the cosin of the angle of launch. The upward velocity is the initial velocity multiplied by the sin of the angle of launch. An example of this would be (1007.54)(cos(10)) for the forawrd velocity if the initial velocity is 1007.54 and an example for the upward velocity would be (1007.54)(sin(10)) -
Angles of Launch
The projectile stays in the air longer if it's around 45 degrees for the anngle, and it also goes a lot farther around 45 degrees, farther than it would at 10 degrees or at 90 degrees because 45 is in the middle.
