A moving ball with a mass of 200 g m1 collides in an inelastic central impact with a resting ball with a mass of 300 g

A moving ball with a mass of 200 g m1 collides in an inelastic central impact with a resting ball with a mass of 300 g, which part of the N kinetic energy of the projectile ball has passed into the internal

As you know, from the condition of the problem, the mass of the ball equals 300 grams. If you think logically, then we get values in 1/3. Thus, it is exactly 1/3 of the kinetic energy of the projectile that has passed into the internal energy that we are looking for.
Answer: N = 1/3.