Chapter 5 test Flashcards
momentum
A quantity that is the product of an objects mass and velocity
units: kg * m/s
direction is associated with momentum due to velocity
Impulse
The change in momentum due to a change velocity
units: N*S
Impulse is…
a product of force and time
more force, less time
less force, more time
what is a closed system
all variables are defined; no external effects
what is an open system
external forces can have an effect on the defined variables
The law of conservation of momentum only applies to…
in a closed system
What is the law of conservation of momentum
The sum of objects momentum in a closed system before a collision = to the sum of all objects momentum after a collision
PA; before+ PB; Before=PA; after+ PB; after
Potential energy
energy due to an objects position and shape
energy
the ability to do work
kinetic energy
the ability to change the position or motion of an object by colliding with it
What are four types of potential energy
Gravitational PE
Elastic PE
Electromagnetic PE
Chemical PE
What is the law of conservation of Energy
While energy may be transfer or it may change forms, the total amount of energy for an object will remain unchanged
“energy cannot be created or destroyed, only transferred”
PE i+KE i=PE f+ KE f
What is an elastic collision
when 2 objects collide and maintain there own separate momentum
What is an Inelastic collision
Two objects get “stuck” together and there masses and momentums converge into one.
What is difference between an Elastic collision and an Inelastic collision
In an Elastic Collison the objects maintain there own separate moment when they collide while in an Inelastic collision they get stuck together and there masses and momentums converge
