Can collision possible without touching?
“For collision, physical contact is not a necessary condition”. How can collision occur without physical contact? If there is no physical contact, then there would be no contact force between particles to act as impulsive force.
Is it necessary for colliding objects to physically touch each other during collision?
It is not necessary for the objects to touch during a collision, e.g. an asteroid flied by the earth is considered a collision because its path is changed due to the gravitational attraction of the earth. One can still use conservation of momentum and energy to analyze the collision.
Is magnetic collision elastic?
It is my understanding that when two magnets collide without physically touching, kinetic energy is conserved and the “collision” is elastic.
Are there any things that can never touch each other?
In real life, two physical systems of particles can never touch because the particles they are made from can never touch. Luckily things don’t need to actually “touch”. In the physical universe, objects quantize to the Planck length and emit fields.
Why are particles never in direct contact with each other?
Particles are, by their very nature, attracted to particles with an opposite charge, and they repel other similarly charged particles. This prevents electrons from ever coming in direct contact (in an atomic sense and literal sense). Their wave packets, on the other hand, can overlap, but never touch.
Is there a way to disable collisions between two colliders?
Consider manipulating your layers at runtime. Physics.IgnoreCollision and Physics.IgnoreLayerCollision allow you to disable collisions between two colliders, and between two layers, respectively. If you want to exclude a specific collider from collisions, there’s no built in way to do that.
How to ignore collisions with certain objects in Unity?
Basically, what I want is for the car to not rotate when colliding with certain objects. Consider manipulating your layers at runtime. Physics.IgnoreCollision and Physics.IgnoreLayerCollision allow you to disable collisions between two colliders, and between two layers, respectively.