negative max height?
I used the equations and found the initial velocity, and it was negative, so then when I put everything back into the y-max equation I got a negative number for the y-max. I don't think that's right, where did I go wrong? Please help ASAP b/c I have class in 45 min!
I still don't see how I don't need the initial velocity. I can plug everything else into the equation. I'm using the equation y=v*sin(angle)*t +.5*g*t
Is this the right equation? If so, why don't I need the velocity, and how do I get around it?
I'm trying to find max height of a projectile and I only know the angle of projection and the time it is in the air. No clue where to start working this problem...don't I need initial velocity to start?