# How to make physics problem obey momentum conservation?

• toesockshoe
In summary, momentum conservation is a fundamental principle in physics that states the total momentum of a closed system remains constant. The key steps to solving a physics problem using momentum conservation are: identifying the system, calculating initial and final momenta, setting them equal, and checking the answer. Examples of momentum conservation in everyday life include jumping off a diving board, playing billiards, and car accidents. This principle is closely related to Newton's laws of motion, particularly the law of conservation of momentum. It can be applied to solve more complex problems by using vector addition and breaking down the problem into smaller parts.
toesockshoe

## Homework Statement

Can you change the system (as you would in a work/energy problem) so you can get rid of all external forces in a momentum problem for example by making your system the earth, a mass, and a spring (if the problem involved those 3 objects)?

P=mv[/B]

## The Attempt at a Solution

conceptual question

Even with a conceptual question you still need to show your own effort.

SammyS
But it's just a yes or no question.

## 1. How does momentum conservation apply to physics problems?

Momentum conservation is a fundamental principle in physics that states that the total momentum of a closed system remains constant. This means that the total momentum before an event or interaction must be equal to the total momentum after the event or interaction. In other words, momentum cannot be created or destroyed, only transferred between objects.

## 2. What are the key steps to solving a physics problem using momentum conservation?

The key steps to solving a physics problem using momentum conservation are: 1) Identify the system of objects involved in the problem, 2) Calculate the initial momentum of the system, 3) Calculate the final momentum of the system, 4) Set the two momenta equal to each other and solve for the unknown variable, and 5) Check your answer to ensure it follows the conservation of momentum principle.

## 3. What are some common examples of momentum conservation in everyday life?

Some common examples of momentum conservation in everyday life include: 1) A person jumping off of a diving board and pushing off the board with their legs to propel themselves forward, 2) A billiard game where the cue ball transfers its momentum to other balls, and 3) A car accident where the total momentum of the cars before and after the collision must be equal.

## 4. How does momentum conservation relate to Newton's laws of motion?

Momentum conservation is closely related to Newton's laws of motion, specifically the law of conservation of momentum. This law states that the total momentum of a system must remain constant unless acted upon by an external force. This is consistent with Newton's first law of motion, which states that an object will remain at rest or in motion unless acted upon by an external force.

## 5. How can momentum conservation be used to solve more complex physics problems?

Momentum conservation can be applied to solve more complex physics problems by using vector addition and breaking down the problem into smaller parts. By considering the momentum of each object involved in the problem and the direction in which it is moving, we can use vector addition to determine the total momentum of the system. This approach can be applied to more complex systems involving multiple objects and interactions.

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