Calculating the highest point of a trajectory

[sjduhig]

1. A soccer ball is kicked with an initial actual velocity of 20 ms at an angle of 20 degrees with the horizontal. Find the vertical distance from ground to highest point.

 

[The legend]

Take ground as x-axis and perpendicular as y axis. There is no acceleration in x direction.As acceleration in y-axis is gravity, and only y component of velocity is responsible for max height just use basic equations of motion under uniform acceleration and find out the answer.