A 0.5 kg ball is thrown vertically upward at a speed of 25 m/s. Its velocity v(t) (in m/s), at time, t (in seconds), is given by v(t)=25-9.8t. Its kinetic energy, K(v) (in Joules), is given by K(v)=0.5v2 [<- 2 as in squared, I don't know how to do sup text..] Express the ball's kinetic energy as a function of time, K(t)

Big thanks to anyone who is willing to help with this! =)