Elastic and Inelastic Collisions An elastic collision occurs when the colliding objects perfectly return to their original shapes and velocities after th...
An elastic collision occurs when the colliding objects perfectly return to their original shapes and velocities after the collision. This implies that the total kinetic energy of the system is conserved, meaning it remains constant throughout the process.
In an inelastic collision, the colliding objects do not return to their original shapes perfectly and instead are locked together after the collision. This means that the total kinetic energy of the system is not conserved, and the colliding objects leave the scene with different velocities.
Examples:
A car traveling at 20 m/s collides with a wall at rest. The car is pushed back by the wall and comes to a stop.
A bowling ball colliding with another bowling ball perfectly rebounds and continues on its original path.
A bullet fired from a gun travels into a wall and stops.
Key Differences:
Elastic collision: Perfect reflection of momentum, total kinetic energy conserved.
Inelastic collision: Objects stick together and leave with different velocities.
Further Discussion:
Elastic collisions are generally more efficient than inelastic collisions.
Elastic collisions involve perfectly matched masses colliding head-on.
Inelastic collisions can be perfectly elastic or perfectly inelastic depending on the initial conditions of the objects