Solving Momentum and Kinetic Energy Relations

In summary, the conversation is about a student who is struggling with solving a physics problem involving conservation of momentum and kinetic energy. They have tried using substitution but have been unsuccessful and are seeking help from others.
  • #1
Garen
28
0

Homework Statement


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Homework Equations


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The Attempt at a Solution


I have gotten these problems wrong too many times. I know that I have to apply both the conservations of momentum and kinetic energy, but for some reason I can't come up with the right answer.

m1=21.3g v1=24.6cm/s
m2=11.6g v2=11.3cm/s

I don't know how to solve these relations with two unknowns. I've tried using substitution from the kinetic energy equation, but I still got it wrong for some reason. Any help for a desperate physics student?​
 
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  • #2
Anyone know where I'm going wrong?
 
Last edited:
  • #3
No one? Really?
 
  • #4
Maybe someone can refer me to another website to answer these questions?
 

FAQ: Solving Momentum and Kinetic Energy Relations

What is momentum?

Momentum is a measure of an object's motion, calculated by multiplying its mass by its velocity. It is a vector quantity, meaning it has both magnitude and direction.

How is momentum related to kinetic energy?

Momentum and kinetic energy are both measures of an object's motion, but they are not directly related. Kinetic energy is the energy an object possesses due to its motion, while momentum is a measure of how much force is needed to change an object's motion.

How do I calculate momentum and kinetic energy?

To calculate momentum, multiply an object's mass (in kilograms) by its velocity (in meters per second). Kinetic energy is calculated by taking half of an object's mass and multiplying it by its velocity squared.

Can momentum and kinetic energy be conserved?

Yes, momentum and kinetic energy can both be conserved in a closed system, meaning there are no external forces acting on the objects in the system. This is known as the conservation of momentum and the conservation of energy, respectively.

How are momentum and kinetic energy used in real-world applications?

Momentum and kinetic energy are important concepts in physics and are used in various real-world applications, such as in sports, transportation, and engineering. They are also used in understanding collisions and the behavior of objects in motion.

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