A collision where both momentum and kinetic energy are conserved.
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What is an elastic collision?
A collision where both momentum and kinetic energy are conserved.
What is an inelastic collision?
A collision where momentum is conserved, but kinetic energy is not. Some KE is converted to other forms of energy.
What is a completely inelastic collision?
A special case of inelastic collision where the colliding objects stick together after the collision.
Define momentum.
Momentum is the product of an object's mass and velocity. It is a vector quantity.
What does it mean for kinetic energy to be 'conserved'?
Kinetic energy being conserved means the total kinetic energy of the system remains constant before and after a collision ($KE_{initial} = KE_{final}$).
What is the effect of kinetic energy not being conserved in a collision?
The collision is classified as inelastic, and some of the initial kinetic energy is transformed into other forms of energy like heat, sound, or deformation.
What happens when two objects stick together after a collision?
This is a completely inelastic collision, and they move with a common final velocity.
What is the effect of increasing the mass of an object on its momentum, assuming velocity remains constant?
Increasing the mass increases the momentum, as momentum is directly proportional to mass ($p = mv$).
What happens when a moving object collides inelastically with a stationary object?
The moving object will transfer some of its momentum to the stationary object, and kinetic energy will not be conserved, often converted to heat or sound.
What is the effect of a collision being perfectly elastic?
Both momentum and kinetic energy are conserved, meaning the total momentum and kinetic energy of the system remain constant before and after the collision.
What are the key differences between elastic and inelastic collisions regarding kinetic energy?
Elastic Collision: Kinetic energy is conserved ($KE_{initial} = KE_{final}$). Inelastic Collision: Kinetic energy is not conserved ($KE_{initial} \neq KE_{final}$).
Compare and contrast momentum conservation in elastic and inelastic collisions.
Both Elastic and Inelastic Collisions: Momentum is always conserved ($p_{initial} = p_{final}$).
How does object behavior differ in elastic versus inelastic collisions?
Elastic Collision: Objects bounce off each other. Inelastic Collision: Objects may stick together, deform, or generate heat/sound.
Differentiate between kinetic energy in elastic and inelastic collisions.
Elastic: Total kinetic energy remains constant. Inelastic: Total kinetic energy decreases (converted to other forms).
What happens to the 'missing' kinetic energy in an inelastic collision?
Inelastic Collision: Kinetic energy is converted into other forms of energy, such as heat, sound, or deformation.