- #1

- 120

- 3

We know for a particle moving under constant acceleration we can use both the equations

[tex] x = \frac{v + v_0}{2}t [/tex] and

[tex] x = v_0t + \frac{1}{2}at^2 [/tex]If we want to find [itex]t[/itex] form each of these equations, the first one gives only one value but the second one gives two values of [itex]t[/itex].

So it seems like if the first equation is used one value of [itex]t[/itex] will be lost.

Now, I can see one of these equation is linear and another one is quadratic; but still, both of those two equations were derived from

*same*principles - how come one turns out to be

*better*than the other?