- #1
sallychan
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Homework Statement
Homework Equations
I don't know how is it related to center of mass.
The Attempt at a Solution
I don't know how to begin.
Thanks a lot for your help !
Momentum and center of mass problem
- Thread starter sallychan
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- Center Center of mass Mass Momentum
In summary, the conversation is about a homework problem related to the center of mass and momentum. The person asking for help is unsure how to begin and is advised to review their class notes on the topic. They are also reminded that they know how to solve the problem, but may need to refresh their understanding of "ballistics". The conversation also mentions the conservation of quantity when only internal forces act in a system.
I don't know how is it related to center of mass.
I don't know how to begin.
Thanks a lot for your help !
- #2
Simon Bridge
Science Advisor
Homework Helper
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You need to review your class notes about momentum and center of mass ... specifically you want to know what happens to the motion of the center of mass.
If you do not have class notes on this, then you need to look it up.
Apart from that, you know how to do this problem ... you know how to find the initial momentum of the bomb right at the highest pint (just before it goes off) and you know how to find the momentum of one of the bits that comes off, both from the clues. If you are drawing a blank at this, then look through your class notes on "ballistics".
If you do not have class notes on this, then you need to look it up.
Apart from that, you know how to do this problem ... you know how to find the initial momentum of the bomb right at the highest pint (just before it goes off) and you know how to find the momentum of one of the bits that comes off, both from the clues. If you are drawing a blank at this, then look through your class notes on "ballistics".
- #3
ehild
Homework Helper
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You know that you have to show some attempt to solve the problem. The stone is projected, so it is projectile motion. What do you know about such motions?
At the top of the trajectory, the stone explodes into two segments. The forces acting during the explosion are internal. What quantity conserves when only internal forces act in a system?
At the top of the trajectory, the stone explodes into two segments. The forces acting during the explosion are internal. What quantity conserves when only internal forces act in a system?
1. What is momentum?
Momentum is a measure of an object's motion. It is calculated by multiplying an object's mass by its velocity. In other words, the more mass an object has and the faster it is moving, the higher its momentum will be.
2. How is momentum related to center of mass?
The center of mass is the point at which an object's mass is evenly distributed. The momentum of an object is directly related to its center of mass, as any changes in the object's motion will also affect its center of mass.
3. What is a center of mass problem?
A center of mass problem involves finding the point at which an object's mass is evenly distributed. This can be a challenging problem, as it requires taking into account the individual masses and distances of all the parts of the object.
4. How is momentum conserved in a center of mass problem?
In a closed system, the total momentum of all objects before and after a collision or interaction will remain the same. In a center of mass problem, this means that the total mass and velocity of the system before and after must be equal, even if individual objects change their velocities.
5. What are some real-world applications of momentum and center of mass?
Momentum and center of mass are important concepts in physics and have many real-world applications. For example, they are essential in understanding and predicting the motion of objects in collisions, as well as in designing structures and vehicles that maintain stability and balance. They are also important in fields such as engineering, sports, and space travel.
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