- Homework Statement:
- A ball is launched at A with a speed u at an angle ϴ (from the horizontal). Show that if a point P moves so as to keep d/dt(tanα)=constant, then P will "catch" the ball at point B.
- Relevant Equations:
- tanϴ =tanα+tanβ
Just a bit of trig. What is the height of (x,y) above P? So what is the horizontal distance from (x,y) to P?Thanks for the help. I found the x and y location of the projectile to be x(t)=ut.cosϴ and y(t)=ut.sinϴ-1/2gt^2 but I'm unsure as to how to find an equation for P using this.