These are collisions whose outcomes are either obvious or can be calculated mentally.

Notice that,

• • the total momentum is conserved.
  • when one mass is much larger than the other, the velocity of the heavier mass is hardly changed by the collision.
  • The two masses travel at a common velocity after the collision.

Perfectly Inelastic “Sitting Duck” Collisions

–

Perfectly Inelastic “Jousting” Collisions

• 03 Dynamics