A(n) 6.9 kg object moving at 2.8 m/s eastward has a one-dimensional elastic collision with a(n) 5.4 kg object moving at 3.9 m/s in the opposite direction. What is the total kinetic energy of the two-mass system after the collision?

To solve this problem we will apply the concept related to the kinetic energy of a system. This can be defined from the main equation of kinetic energy, equivalent to half the product of mass and the squared velocity. As energy is conserved, the sum of the total energy before the explosion will be equal at the end of the explosion. Mathematically this is,

Therefore the total kinetic energy of the two mass is equal to 68.11J

k2s for potassium sulphide