There's no such thing as a perfectly elastic collision between everyday objects, if that's what you are asking.

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In this video, David derives the expression that we can use as a shortcut to solve for finding the velocities in an elastic collision problem.

Block A is initially moving to the right on a horizontal frictionless surface with speed v 0. An identical block, B, is initially moving to the left with speed v 0 toward block A, as modeled below. The blocks …

In this video, David solves an example elastic collision problem to find the final velocities using the easier/shortcut approach.

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Review the key concepts and skills for inelastic collisions. Understand how to determine if a collision is elastic or inelastic.

Review the key concepts, equations, and skills for elastic collisions, including how to predict objects' final velocities.

Object B has a mass of 4 kg and is moving with a velocity of 3 m/s along the x -axis. After the collision, object A moves with a velocity of 4 m/s at an angle of 45 ∘ to the x -axis. What is the final velocity of …

Collisions can be elastic or inelastic. Learn about what's conserved and not conserved during elastic and inelastic collisions.