Question

before
m₁ v₁
m₂ v₂=0
after
v₁ m₁
m₂ v₂
the picture shows which type of collision?
perfectly inelastic collision
elastic, inelastic and perfectly inelastic collision
inelastic collision
elastic collision

Explanation:

In an elastic collision, both momentum and kinetic energy are conserved, and the two objects remain separate after the collision (they do not stick together). The diagram shows object $m_1$ (initially moving) colliding with stationary $m_2$, and after the collision, both objects move separately with different velocities, which matches the characteristics of an elastic collision. Perfectly inelastic collisions involve objects sticking together, and inelastic collisions involve kinetic energy loss without sticking, which do not match the diagram.

Answer:

Elastic Collision