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Types of Collisions explained with animation | Engineering Easy | YouTubeToText
YouTube Transcript: Types of Collisions explained with animation
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Video Summary
Summary
Core Theme
Collisions are physical interactions involving the transfer of momentum and kinetic energy between objects, categorized as either elastic (conserving kinetic energy) or inelastic (losing kinetic energy, often as heat or damage).
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[Music]
collisions happen when two or more
objects come into contact with each
other and a transfer of momentum and
kinetic energy occurs
collisions occur every time you hit a baseball
baseball
bounce a basketball
or play pool
when objects collide in the absence of
external forces they form a system in
which the net momentum of both objects
before the collision equals the net
momentum of both objects after the collision
collision
there are two types of collisions
elastic collisions
and inelastic collisions
an elastic collision is defined as one
in which no kinetic energy is lost no
damage is done to the objects involved
and there is no generation of heat
in the real world no collision is
perfectly elastic because so many other
forces come into play like friction
air resistance
however the game of pool offers a fairly
good elastic representation
pool tables and billiard balls are
designed to reduce the effects of friction
friction
resulting in close to ideal elastic collisions
collisions
when the cue ball hits the resting eight
ball it sets the eight ball in motion
having transferred all of its momentum
and kinetic energy the cue ball comes to
a rest
the net momentum of the cue ball before
the collision equals the net momentum of
the eight ball after the collision
momentum and kinetic energy are
transferred and conserved
if the eight ball is already in motion
when a similarly moving cue ball
collides with it then the eight ball
will gain some of the initial cue ball's
momentum and the net momentum before and
after the collision will be conserved
if the eight ball and the cue ball are
traveling at the same speed and collide head-on
head-on
then they will bounce off of each other
with the same momentum but in opposite
directions their momentum and kinetic
the second type of collision is an
inelastic collision in an inelastic
collision momentum is still conserved
but kinetic energy is lost in the system
resulting in the creation of heat
and damage done to the colliding bodies
bodies that are involved in an inelastic
collision end up entangled with each
a clear example of an inelastic
collision is a car crash in order to
understand the conservation of momentum
in this example we'll imagine a car
crash taking place in a world where road
friction and air resistance have no
bearing on the system
let's take two cars a and b with equal mass
mass
car b is parked when car a plows into it
head on at a velocity of 10 meters per second
second
kinetic energy is immediately lost as
the cars become mangled and stuck
together some energy is converted into heat
heat
momentum after the accident however is
conserved with no road resistance the
doubly massive car wreck will continue
moving in the same initial direction as
the after collision momentum is easily
calculated using the conservation of
momentum equation
where the mass of car a times its speed
of 10 meters per second before the collision
collision
is equal to the mass of car a plus the
mass of car b times the final velocity
rearranging the equation to solve for
the velocity after the collision
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