The formula for Kinetic energy is:
KE (Kinetic Energy) = 1/2 M (mass) x V (velocity) ^2
Substitute the known values into the equation:
KE = 1/2 (315) x (5.12)^2
Find out the values in sections (split the formula in half)
1/2 x 315 = 157.5
5.12^2 = 26.2144
Now times the answers together to complete the formula.
157.5 x 26.2144 = 4,128.768 km^2/s