Elastic collisions are a fundamental concept in physics, describing collisions where both kinetic energy and momentum are conserved. In an elastic collision, the total kinetic energy of the system before and after the collision remains constant. This means that the objects involved rebound from each other without any loss of energy to other forms, such as heat or sound. Elastic collision formula: v1' = [(m1 - m2) / (m1 + m2)] * v1 + [2 * m2 / (m1 + m2)] * v2 v2' = [2 * m1 / (m1 + m2)] * v1 + [(m2 - m1) / (m1 + m2)] * v2 v1: object1 velocity v2: object2 velocity v1': updated object1 velocity v2': updated object2 velocity m1: object1 mass m2: object2 mass During an elastic collision, the momentum of each object involved is transferred to the other object without any loss. This conservation of momentum means that the total momentum of the system remains the same before and after the collision, even though individual velocities may change.