Explain non head on collision i.e. collision in two dimensions?

In inelastic collision,

explain close packing in one dimension.

Explain hexagonal close packing in three dimensions.

When two bodies stick together after collision, the collision is said to be

Define elastic collision

Choose the correct options When the bodies stick together after collision, the collision is said to be

A body of mass 2 kg travels with a velocity of 8 m//s makes a head on collision with another body having mass 4 kg, which is travelling in the same direction with a velocity of 1 m//s . Calculate the velocities of the two bodies after collision. Find the loss in kinetic energy of the system. (Given e = 0.5)

Explain cubic close pakcing in three dimension.

During collision of electrons and photons,