A ball is kicked from horizontal ground towards a vertical wall, as shown in Fig. 2.1.

The horizontal distance between the initial position of the ball and the base of the wall is 24 m. The ball is kicked with an initial velocity v at an angle of 28° to the horizontal. The ball hits the top of the wall after a time of 1.5 s. Air resistance is negligible.

Calculate the initial horizontal component vX of the velocity of the ball.