# Principle of Linear Impulse and Momentum for a Single Particle

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Mechanical Engineering
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JoVE Core Mechanical Engineering
Principle of Linear Impulse and Momentum for a Single Particle

### Nächstes Video14.2: Principle of Linear Impulse and Momentum for a Single Particle: Problem Solving

Linear momentum is a vector that shares the same direction as the velocity, while linear impulse measures the effect of a force during the time it acts on the particle.

Consider the equation of motion for a particle of mass m, where acceleration and velocity are measured from an inertial frame of reference.

By integrating the equation with respect to time and rearranging the terms, an equation is obtained which represents the principle of linear impulse and momentum.

It states that the initial momentum of the particle, added to the sum of all the impulses applied to the particle during a specific time period, equals the final momentum of the particle.

These terms can be illustrated using impulse and momentum diagrams.

The momentum diagrams depict the direction and magnitude of the initial and final momentum of the particle, while the impulse diagram represents all the impulses acting on the particle at intermediate points along its path.

The principle can be expressed as three scalar equations by resolving each vector into its components.

## Principle of Linear Impulse and Momentum for a Single Particle

Linear momentum is a fundamental concept in physics that describes the motion of an object. It is a vector quantity, having a magnitude equal to the product of its mass and its velocity, and direction along the object's velocity. On the other hand, linear impulse, also known as momentum impulse, is a concept in physics related to the change in the linear momentum of an object. Impulse is a vector quantity defined as the product of force and the time over which the force is applied.

Delving into the equation of motion for a particle of mass 'm' in an inertial frame, acceleration and velocity are quantified. Integrating this equation over time and rearranging terms yields a formula embodying the principle of linear impulse and momentum. This principle asserts that the sum of the initial momentum of the particle and all applied impulses within a specific timeframe equates to the final momentum. Visualization is facilitated through impulse and momentum diagrams. Momentum diagrams portray the direction and magnitude of initial and final momentum, while the impulse diagram delineates impulses at various points along the particle's path.

To further elucidate, this principle can be translated into three scalar equations by resolving vectors into components. This analytical approach captures the essence of particle dynamics and establishes a foundation for comprehending real-world scenarios involving motion and force interactions.