From physics, we know that the kinetic energy of an object with mass m and velocity v is given by E = 0.5mv^2 .

From physics, we know that the kinetic energy of an object with mass m and velocity v is given by . Let's say that the object has mass m = 500 kg and velocity v = 400 m/s and m decreases 1 kg per second and v decreases 2 m/s per second.

From this, let's find out what the time rate of change of E is.