Question

Consider collision problems. Real-world collisions are rather complicated to capture in full and we approximate them by special cases. Name the two basic collision types we use to describe and idealize real-world collisions. What distinguishes both? In most collision problems we know a) the masses and initial velocities of objects involved in the collision and ask for their final velocities, or b) we know the objects’ masses and aftercollision (final) velocities and ask what their initial velocities were (forensic engineering). Which conservation laws help to mathematically describe collision situations? Name and state them in form of (ansatz) equations. Looking at your answer, explain whether or not these conservation laws are valid for each of the previously named types of collisions.

Answer 1

The most common ideaize collision are.

Perfect elestic collision or perfectly inelastic collision.

We find the answer under consideration of conservation of linear momentum and conservation of kinetic energy.

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