Impulse and Momentum - Formulas and Equations - College Physics | Summary and Q&A

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November 15, 2023
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The Organic Chemistry Tutor
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Impulse and Momentum - Formulas and Equations - College Physics

TL;DR

This video provides a quick review of impulse and momentum equations, explaining their relationship and how to calculate them.

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Key Insights

  • 💆 Momentum is the product of mass and velocity, representing mass in motion.
  • ⌛ Impulse is the product of force and time, indicating the amount of force applied over a certain time period.
  • 💱 The impulse-momentum theorem relates impulse to the change in momentum.
  • ☠️ The force exerted by a fluid can be calculated using the equation force = mass flow rate * velocity.
  • 🫡 Force can also be described as the derivative of the momentum function with respect to time.
  • 🥹 Conservation of momentum holds true when there are no external forces acting on a system.
  • 💥 In an inelastic collision, momentum is conserved but kinetic energy is not.

Questions & Answers

Q: What is momentum and how is it calculated?

Momentum is the product of an object's mass and velocity. It is calculated by multiplying the mass with the velocity vector.

Q: How is impulse calculated and why is time important?

Impulse is calculated by multiplying the force applied to an object with the time period over which the force is applied. Time is important because it determines the duration of the force acting on the object.

Q: How are impulse and momentum related?

Impulse is equal to the change in momentum. When a force is applied to an object, it changes the object's momentum by exerting an impulse on it.

Q: How can the force exerted by a fluid on an object be calculated?

The force exerted by a fluid can be calculated using the equation force = mass flow rate * velocity. It requires knowing the mass flow rate and the velocity of the fluid.

Summary & Key Takeaways

  • Momentum is calculated by multiplying mass with velocity. It is a vector quantity that represents mass in motion.

  • Impulse is calculated by multiplying force with time. It represents the amount of force applied to an object over a certain time period.

  • The impulse-momentum theorem states that impulse is equal to the change in momentum.

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