Collisions
Presentation
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Science
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12th Grade
•
Practice Problem
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Medium
+16
Standards-aligned
LUCAS GALAN
Used 317+ times
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9 Slides • 7 Questions
1
Collisions
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3
A collision is any crash or interaction between two or more objects.
What is a collision?
4
Multiple Choice
Which of the following is NOT a collision?
Two cars hit each other when at an intersection and each ends up in a different location.
While playing pool, the white ball hits a solid, red ball and they ricochet off each other.
A train locomotive latches onto a cargo second railway wagon.
A wrecking ball crashes into the side wall of a large, abandoned building.
5
No!
There are two main types of collisions:
Elastic & Inelastic
Are all collisions the same?
6
These are crashes where the two objects get stuck together.
Since they're stuck together, they move as one, massive object; sharing one change in momentum.
Inelastic
These are crashes where the two objects hit each other then separate.
Since they separate, each object experiences their own changes in momentum after the crash.
Elastic
7
Match
Match the following
Inelastic Crash
Elastic Crash
Not A crash
A slime hand tossed & sticks to a window
Bumper cars
Two lumps of playdoh squeezed into one
A slime hand tossed & sticks to a window
Bumper cars
Two lumps of playdoh squeezed into one
8
Both cars share a new momentum with their total mass:
p = (m1 + m2) * v
Their masses combine.
After Crash
Each object has its own starting momentum. p1 & p2
The total momentum before the crash: p1 + p2
Before Crash
Inelastic Collisions
9
Each car has its own final momentum: p1f & p2f
The total momentum after the crash: p1f + p2f
After Crash
Each object has its own initial momentum. p1i & p2i
The total momentum before the crash: p1i + p2i
Before Crash
Elastic Collisions
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Drag and Drop
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Drag and Drop
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The Law of Conservation of Momentum
"For a closed system,
The total momentum before an event
is equal to the total momentum
after an event"
13
Multiple Choice
Which of the following occurs for an inelastic collision?
p1i + p2i -> p1f + p2f
p1i + p2i -> pf
where...
pf = (m1 + m2) * v
14
Multiple Choice
Which is true of the law of conservation of momentum?
Momentum is always conserved, no matter what.
Momentum is always conserved in closed systems.
15
Multiple Choice
What does "(m1+m2)" mean?
It means that, during an inelastic collision, the objects get stuck, so we combine their masses to find their combined final momentum.
It means that you add two masses no matter the type of crash, in order to follow the law of conservation of momentum.
16
thank you!
Collisions
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