Mduduzi Mathunjwa

In an elastic collision, kinetic energy is conserved. The kinetic energy of the player and the ball just before collision is equal to that after collision. Assume that just after heading the ball, the velocity of the player is zero. You can also use the c...

(a) v = v0 + at, v0 = 5.5 m/s, a = -g = -9.80 m/s. (b) y = y0 + v0t + (1/2)at2 y-y0 = v0t + (1/2)at2 at2 is acceleration x time squared.