Question

._.

Answer 1

you may not know this, but we have this equation of trajectory of a particle in physics. its a quadratic equation.

Answer 2

ok imagine, you threw a ball at an angle upwards.
like this.
this is a parabola, which means a quadratic equation.

Answer 3

you could say trajectory of a particle when thrown upwards at an angle.

Answer 4

http://openstudy.com/study#/updates/4e9303310b8bfb9f23eff5b1
take a look. i googled your question. :P

Answer 5

yes.

Answer 6

haha. sadly this was the last one. :c

Answer 7

yeah i know. :P