- #26

rollingstein

Gold Member

- 646

- 16

I don't agree.Actually i got the total speed dependent only on the x axis so saying that v.total is dx/dt is correct because it's no longer the slope of the parabola but the slope of f(x).

The only way v = dx/dt is if [itex]\vec{v}[/itex] was directed along the x axis.

i.e. v_y was zero.

But here the velocity does have a y component so I don't see how you are allowed to do what you did.

OTOH, your elegant solution form tempts me but still.....

PS. Maybe I am wrong. I'm no expert.