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Chapter 6 Physics

Linear Momentum and Collisions

QuestionAnswer
In what types of collision(s) is momentum conserved? Elastic and inelastic collisions
In what type of collision(s) is kinetic energy conserved? Elastic collision
Given a graph of Force vs. Time, what does the area under the graph equal? Change in momentum
What two factors affect the amount of momentum an object has? Mass and velocity
What two factors affect the impulse on an object? Force and time
Assuming the change in momentum stays constant, how does increasing the force applied to an object affect the time needed to change the momentum? Decreases amount of time needed
Assuming the change in momentum stays constant, how does increasing the time that the force is applied to the object affect the size of the force needed to change the momentum? Decreases amount of force needed
What does conservation of momentum mean? Total momentum of the objects in a system does not change
Can the individual momentums of the objects involved in a collision change? Explain. Momemtum of an object can change, but momentum lost by one object must be gained by the other objects.
Elastic Collision Both momentum and energy are conserved
Inelastic Collision Momentum is conserved but energy is not
Perfectly Inelastic Collision Two masses before the collision combine after the collision and move with the same velocity
Elastic Collision (example) Rubber balls bouncing off each other
Inelastic Collision (example) High speed car collision
Perfectly Inelastic Collision (example) Bug on a windshield (stick together)
Created by: vahajuddin