Collision is the interaction between two objects in which they come into physical contact with each other. This can result in an exchange of energy or a change in direction or motion for one or both objects.
Friction is a force that resists motion between two surfaces in contact. When two objects collide, the friction between them can either increase or decrease the impact of the collision depending on the direction and magnitude of the forces involved.
The outcome of a collision can be affected by several factors, including the mass and velocity of the objects involved, the type of materials they are made of, and the angles at which they collide.
Yes, collisions can be perfectly elastic, meaning that no energy is lost during the collision and the objects involved bounce off each other with the same speed and direction as before the collision. However, most collisions are not perfectly elastic and some energy is usually lost in the form of heat or sound.
Contact force refers to the force that acts between two objects in contact with each other. In collisions, the contact force between the two objects can play a crucial role in determining the outcome of the collision, such as whether the objects will stick together or bounce off each other.