Enter the initial kinetic energy, the change in mass, and the change in velocity into the calculator to determine the Final Kinetic Energy. 

Final Kinetic Energy Formula

The following equation is used to calculate the Final Kinetic Energy.

KEf = Kei + 1/2*dm*dV^2

  • Where KEf is the Final Kinetic Energy (Joules)
  • Kei is the initial kinetic energy (Joules)
  • dm is the change in mass (kg)
  • dV is the change in velocity (m/s)

What are the units for Final Kinetic Energy?

The most common units for Final Kinetic Energy are Joules.

How to Calculate Final Kinetic Energy?

Example Problem:

The following example problem outlines the steps and information needed to calculate the Final Kinetic Energy.

First, determine the initial kinetic energy. In this example, the initial kinetic energy is determined to be 450 (Joules).

Next, determine the change in mass. For this problem, the change in mass is measured to be 4 (kg).

Next, determine the change in velocity. In this case, the change in velocity is found to be 5 (m/s).

Finally, calculate the Final Kinetic Energy using the formula above: 

KEf = Kei + 1/2*dm*dV^2

Inserting the values from above and solving the equation with the imputed values gives: KEf = 450 + 1/2*4*25^2 = 500 (Joules)