Problem 1 For a projectile launched on an inclined plane as

Problem 1: For a projectile launched on an inclined plane as shown with initial velocity v, and angle 0 find a relationship for the launch angle that maximizes the range d. For this&, write a relationship for the radius of curvature of the path when the projectile hits the ground Path of the projectile

Solution

yes, its true.

U have done it in correct way.

If you put PHI = 0 you will get radius of curvature for horizontal projectile.