Question

A 0.50 kilogram ball is held at a height of 20 meters. What is the kinetic energy of the ball when it reaches halfway after being released?

Answer 1

initial velocity u=0
h=10 m
g=9.8 m/s
final velocity v=?
\[v^2-u^2=2gh\]
find v

Answer 2

then Kinetic energy\[=\frac{ 1 }{ 2 } m v^2\]