Answer:
90 J
Explanation:
The kinetic energy of an object is given by:
[tex]K=\frac{1}{2}mv^2[/tex]
where
m is the mass of the object
v is its speed
The ball in this problem has a mass of m=0.05 kg and a speed of v=60.0 m/s, therefore its kinetic energy is
[tex]K=\frac{1}{2}mv^2=\frac{1}{2}(0.05 kg)(60.0 m/s)^2=90 J[/tex]
