Incomplete Momentum bar chart for collision

In summary, the conversation discusses an incomplete momentum bar chart for a collision lasting 15 milliseconds. The question asks for the magnitude of the average collision force and the solution involves dividing the change in momentum by the time taken. The final answer is -8N, which was initially attempted but found to be incorrect.
  • #1
chicagobears34
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Homework Statement


The figure (Figure 1) is an incomplete momentum bar chart for a collision that lasts 15ms .

Figure 1: http://session.masteringphysics.com/problemAsset/1384208/4/knight_Figure_09_06.jpg

What is the magnitude of the average collision force exerted on the object?
Express your answer to two significant figures and include the appropriate units.


Homework Equations


Pix+Jx=Pfx


The Attempt at a Solution


I've never seen a momentum bar chart before and we never learned anything like this in class.
i tried -8N because 6-8=-2, but that was wrong
How am I supposed to approach this problem?
 
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  • #2
-8 is actually the magnitude of change in momentum. You must divide it by the time taken to get the average force.
 
  • #3
yes, that makes sense and it is correct.
Thanks Sunil!
 

1. What is an incomplete momentum bar chart for collision?

An incomplete momentum bar chart for collision is a visual representation of the momentum before and after a collision between two objects, with some information missing. It shows the mass and velocity of each object before and after the collision, but may not include information about the direction of the objects' motion or the forces involved.

2. How is an incomplete momentum bar chart for collision different from a complete one?

A complete momentum bar chart for collision includes all the relevant information about the collision, including the direction of the objects' motion and the forces involved. An incomplete chart may only show the mass and velocity of the objects before and after the collision, leaving out other important details.

3. Why would an incomplete momentum bar chart for collision be used?

An incomplete momentum bar chart for collision may be used if only limited information is available about the collision, or if the focus is on specific aspects of the collision, such as the change in momentum or the relative masses of the objects involved.

4. How can an incomplete momentum bar chart for collision be interpreted?

Interpreting an incomplete momentum bar chart for collision requires understanding of the basic principles of momentum, such as the conservation of momentum and the relationship between mass and velocity. It can also be helpful to compare the relative sizes of the bars and their positions on the chart to make inferences about the motion and forces involved in the collision.

5. What are the limitations of using an incomplete momentum bar chart for collision?

One limitation of using an incomplete momentum bar chart for collision is that it may not accurately represent the full picture of the collision and may lead to incorrect conclusions. It is also important to note that the chart only shows the momentum of the objects, and does not provide information about other factors that may have influenced the collision, such as friction or elasticity.

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