## Podcast Beta

## Questions and Answers

What is the symbol for Linear Momentum?

P (slanted P)

What is the equation for Linear Momentum?

P = mv

Is Linear Momentum a scalar or vector?

True

What are the units for Linear Momentum?

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More mass causes the object to move slower.

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More mass causes more momentum.

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A quantity defined as the product of an object's mass and its velocity.

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It takes less force to change the motion of an object with greater momentum.

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What is the impulse momentum theorem?

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What is impulse?

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Impulse is equal to the ________ of the object acted on.

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Impulse is the product of the _____ and the _____ over which the force acts on an object.

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Longer contact time equals less impulse.

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Longer contact time equals more impulse equals _____ change in momentum.

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When are changes in momentum used?

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When 2 or more objects interact, the ____ of the closed, isolated system remains the same.

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What is the equation for momentum conservation?

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Friction will be ignored for momentum conservation problems.

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Momentum is also conserved for objects ______.

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As long as there are no _____ acting on the system, the total momentum remains constant.

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The total momentum of any system of objects interacting with one another remains constant regardless of the ___ of the forces between the objects.

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What happens when two objects collide and move together as one mass?

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What is the equation for an inelastic collision?

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Pay attention to the ______ in collisions.

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KE is conserved in inelastic collisions.

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KE becomes _____ or _______ if the object deforms.

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Loss of KE can be calculated using _______ to find _____ (-KE means loss).

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What happens to objects after a collision in an elastic collision?

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KE before and after the collision is the same in an elastic collision.

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A collision in which the final kinetic energy is less than the initial kinetic energy is called what?

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A collision in which the bodies stick together after the collision is called what?

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What is a collision between ideally elastic bodies?

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## Study Notes

### Linear Momentum

- Symbol for Linear Momentum is P (slanted P).
- Equation for Linear Momentum: P = mv, where m is mass and v is velocity.
- Linear Momentum is a vector quantity, meaning it has both magnitude and direction.
- Units for Linear Momentum are kgâ‹…m/s.
- Increasing mass results in the object moving faster.
- More mass results in more momentum.

### Impulse and Momentum Change

- Defined as the product of an object's mass and its velocity.
- Greater momentum requires more force to change motion compared to lower momentum.
- Impulse-Momentum Theorem: Fâˆ†t = âˆ†p, where F is force, âˆ†t is time interval, and âˆ†p is change in momentum.
- Impulse is the change in momentum caused by a constant external force acting over time.
- Impulse can be calculated using the product of force and time.
- Longer contact time increases impulse and results in a greater change in momentum.

### Applications and Conservation

- Changes in momentum are relevant in sports and safety devices like airbags.
- In a closed, isolated system, the net momentum remains constant during interactions.
- Momentum conservation equation: m1v1i + m2v2i = m1v1f + m2v2f.
- External forces, such as friction, are generally ignored in momentum conservation problems.
- Momentum is conserved for objects pushing away from each other.

### Collisions

- Two primary types of collisions: inelastic and elastic.
- Inelastic collisions occur when two objects collide and move together as a single mass; KE is not conserved.
- Inelastic collision equation: m1v1i + m2v2i = (m1 + m2)vf.
- The sign of velocities in collisions is important for calculations.
- Kinetic Energy (KE) can convert to sound or internal energy if deformation occurs during an inelastic collision.
- The loss of KE can be evaluated using momentum conservation to determine final velocities.

### Specific Collision Types

- Elastic collision: objects remain separate after the collision and KE is conserved; initial and final KE values are the same.
- Perfectly inelastic collision: bodies stick together after the collision, resulting in a loss of KE.

## Studying That Suits You

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## Description

Test your knowledge of momentum with these flashcards that cover the fundamentals such as definitions, equations, and units. Perfect for students needing a quick review or study aid for Physics Chapter 6.