1. The problem statement, all variables and given/known data 1. Find the maximum angle of projection of a projectile such that its position vector from the origin to the subsequent position of the projectile is always increasing. 2. Consider two masses at either end of a frictionless pulley. The first block of mass 10kg sits on a inclined plane while the other block of mass 5kg hangs on the other end of the pulley. The coefficient of kinetic friction between the plane and the block is 0.2. Find the angle of inclination of the plane if the masses are to move with constant velocity. 3. Find the angle of projection of a projectile if its horizontal range will be equal to the magnitude of the maximum height reached. 4. A projectile is launched at an angle of (degrees)40 with an initial velocity of 25m/s when upon traveling 22m horizontally it strikes a wall. Find the height and velocity of the projectile when it hits the wall. 2. Relevant equations i dont know how to do all these... 3. The attempt at a solution i'm clueless.