A completely inelastic collision in a car crash is when two objects (or cars) collide and stick together after the impact. This means that the objects move together with the same velocity after the collision, and there is no separation between them.
Momentum is conserved in a completely inelastic collision in a car crash because the total momentum of the system (both objects) before and after the collision remains the same. This is based on the law of conservation of momentum, which states that momentum cannot be created or destroyed, only transferred between objects.
The outcome of a completely inelastic collision in a car crash can be affected by factors such as the mass and velocity of the objects involved, the angle of collision, and the presence of external forces such as friction or air resistance.
In a completely inelastic collision, kinetic energy is not conserved. Some of the kinetic energy of the objects before the collision is converted into other forms of energy, such as heat or sound, during the collision. This results in a decrease in the total kinetic energy of the system after the collision.
Yes, a completely inelastic collision in a car crash can be dangerous, as it often results in a significant amount of force and damage to the cars and the passengers involved. This type of collision can also cause injuries to the passengers due to the sudden change in velocity and the forces involved.