Collision Lab Simulation

When two objects collide, the total momentum of the pair is conserved as long as no outside force acts. What changes between collisions is kinetic energy: in an elastic collision it is conserved too, in an inelastic one some is turned into heat and sound, and in a perfectly inelastic collision the objects stick together.

This collision lab lets you set masses, velocities and elasticity for balls in one or two dimensions, then watch momentum vectors, the centre of mass and the kinetic energy before and after. It is ideal for Work, Energy and Power and System of Particles (Class 11) and for the collision questions JEE loves — such as why equal masses swap velocities in a head-on elastic collision.