Working out velocity using Parabola equation?

Question

How exactly do I work out velocity using a parabola equation? This stupid assignment is driving me mental!

My equation is=

Y=ax^2 +bx+c

Where:

A=-0.0117624945

B= 2.277235736

C=-18.39009288

R^2= 0.9657872018

I don't think I need the R^2 but that is what came up! Any help would be great before I have to check myself into a mental hospital.... Or my laptop gets thrown out the window... closely followed by my graphics calculator!

Thankyou :)

Answer 1

hehehehe..

usually in physics, y is assigned as s(t), where t is replaced by x in your equation

so your equation is describing the length y(x) where x = time

you know that velocity is the derivative of length y(x) (or s(t)) so the velocity is y'(x)

v(t) = s'(t) , in your case velocity = y'(x)

i don't know what r^2 is in your case

but the velocity would be in your case:

velocity = y'(x) = 2ax + b , where x = time

Answer 2

Omg u so way must be smart

i have no idea

sorry to get ur hopes up

omgggg ommgggg who does know that

arhhhh ur soo smart LOLz