5. Conservation of Linear Momentum Flashcards
is conserved for all collisions as long as external forces don’t interfere.
Momentum
Momentum is the concept of..
Concept of inertia with motion- momentum
Can you think of a case where a roller skate and a truck would have the same momentum?
the roller skate and truck can have the same momentum if the speed of the roller skate is
much greater than the speed of the truck.
A moving object can have a large momentum if it has a…
large mass, high speed or both
What factors affect an object’s momentum?
The change in momentum
depends on the force that acts
and the length of time it acts.
IMPULSE
If the momentum of an object changes, either the ___ or the ___ or both change.
mass
velocity
To increase the momentum of an object, apply the ___ possible for as long as possible.
greatest force
Impulse- when you extend the ___, you reduce the ___.
time; force
A system of objects that meets these two requirements is said to be a closed system (also called an isolated system).
Conservation of Momentum
In Conservation of Momentum, the mass of the system must remain ___ during the interaction.
constant
In Conservation of Momentum, the net external force on the system must be
zero
When any quantity in physics does not change, we say it is
conserved
net momentum before collision is equal to
net momentum AFTER collision
before=after
A collision in which the kinetic energy is NOT conserved is called
inelastic collision
When two bodies collide and both the momentum and energy are
conserved then it is called
elastic collision
