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How does conservation of momentum apply to collisions?

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How does conservation of momentum apply to collisions?

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We can use it to figure out how fast objects were moving or are moving after a collision.

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What factors affect how much an object’s momentum changes?

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What factors affect how much an object’s momentum changes?

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Force and time!
Impulse = Force * Time = change in momentum

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What factors affect an object's momentum?

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What factors affect an object's momentum?

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Mass & Velocity

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yes! Impulse causes a change in momentum for objects.

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Why does it matter the length of time the force is being applied?

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Why does it matter the length of time the force is being applied?

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The impact will be very different if the time is different. Think about the sheet being a cushion and adding more time to slow down, versus when the egg hit the surface and had to slow to a stop immediately.

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By momentum we mean inertia in motion? What is inertia?

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By momentum we mean inertia in motion? What is inertia?

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Yes we do!
Inertia is the property of any body/object to resist changes in its state of motion. Mass is the measure of inertia.
More mass = more inertia = harder to change your motion.

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When a dish falls, will the impulse be less if it lands on a carpet than if it lands on a hard floor?

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When a dish falls, will the impulse be less if it lands on a carpet than if it lands on a hard floor?

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Yes! Because of the time added to slow down and lessen the impact

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Is it true that a French scientist named “Descartes” introduced momentum before Newton. Yes

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Is it true that a French scientist named “Descartes” introduced momentum before Newton. Yes

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How did humans find out about momentum? Experiments and observations.

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How do I know when I need to use the law of conservation of momentum?

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How do I know when I need to use the law of conservation of momentum?

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Big clues are when they say "before the collision" and "after the collision"

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Force

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How do i know when i need to use this equation

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How do i know when i need to use this equation

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You'll be asked for the momentum. If you are given the mass and the velocity of an object, that's a big clue to calculate momentum.

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Why do I have to do extra math if the question gives us the momentum before the collision which is gonna equal the momentum after the collision which is what we're looking for?

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Why do I have to do extra math if the question gives us the momentum before the collision which is gonna equal the momentum after the collision which is what we're looking for?

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Sometimes we want to know how fast the objects are moving, so we need to do a little bit of extra math.

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How does it continue moving if the force is stopped

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How does it continue moving if the force is stopped

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Will it stop as soon as there's no force or does it keep continuing
Inertia. Natural tendency to resist changes to motion

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What if there's multiple different velocities in the word question, how do I know which velocity to use to find the momentum?

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What if there's multiple different velocities in the word question, how do I know which velocity to use to find the momentum?

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Each velocity should be for just one object. So you might need to slow down, read carefully, and match what object the velocity is talking about. So for example: If it says "A 5 kg ball is rolling at 10 m/s" the velocity 10 m/s is describing the ball.

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Can momentum become bigger and bigger if more objects come in?

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Can momentum become bigger and bigger if more objects come in?

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Yes! More objects in the system can transfer more momentum.

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Can impulse make momentum go lower or can impulse only make momentum go up?

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Can impulse make momentum go lower or can impulse only make momentum go up?

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It can go lower as well.

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Can momentum be heavy or light? Or maybe both.

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Can momentum be heavy or light? Or maybe both.

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Momentum isn't described that way, but weight is. :)

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Are there any objects in the universe without momentum?

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Are there any objects in the universe without momentum?

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Technically no! Everything in the universe is moving all the time, so if you have mass and velocity, you have momentum. However, we can describe an object as not moving relative to something else, like saying this house is at rest relative to the earth.

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kg * m/s

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p = m*v

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If we have the momentum but not the mass or velocity, how will we find out the mass and velocity?

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If we have the momentum but not the mass or velocity, how will we find out the mass and velocity?

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p = m*v
m= p/v
v= p/m

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Other than making objects go faster what else can Momentum do?

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Other than making objects go faster what else can Momentum do?

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Momentum actually doesn't make objects go faster, forces do. Forces cause acceleration

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Is there anything like a force that is stronger than momentum?

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Is there anything like a force that is stronger than momentum?

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Momentum isn't a force, but it is changed by a force. There are lots of different types of forces of varying strengths.

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What's the difference between motion and momentum?

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What's the difference between motion and momentum?