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DuckAmuck
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In collisions that are inelastic or partially elastic, how can we predict how much of the energy lost to the surroundings becomes heat, and how much becomes sound? What determines that fraction?
An inelastic collision is a type of collision in which the total kinetic energy is not conserved. In other words, some of the kinetic energy is lost during the collision and is converted into other forms of energy, such as heat or sound.
In an elastic collision, the total kinetic energy is conserved and there is no loss of energy. This means that the objects involved in the collision bounce off each other and retain their original shapes and velocities. In an inelastic collision, the objects may stick together or deform, and some of the kinetic energy is lost.
The amount of energy lost in an inelastic collision depends on the materials of the objects involved, the speed and mass of the objects, and the angle and direction of the collision. Objects with higher mass or greater elasticity will generally experience less energy loss in a collision.
The law of conservation of momentum states that the total momentum of a closed system remains constant. In an inelastic collision, the total momentum before the collision is equal to the total momentum after the collision, even though some of the kinetic energy may be lost.
Inelastic collisions occur in many everyday situations, such as when a car collides with a tree or when a ball is caught by a catcher's mitt. Other examples include a bullet hitting a target, a baseball bat hitting a ball, or a person jumping onto a trampoline. In each of these cases, some of the kinetic energy is lost and converted into other forms of energy.