What is the change in momentum when an object is brought to rest?

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Homework Help Overview

The discussion revolves around the concept of momentum and impulse, specifically focusing on how to determine the change in momentum when an object is brought to rest. The subject area includes principles of mechanics related to mass, velocity, and the relationship between impulse and momentum.

Discussion Character

  • Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants explore the calculation of impulse in relation to momentum, questioning how to derive the impulse from known quantities such as mass and speed. There is a discussion on the definitions and relationships between momentum and impulse, with some participants reiterating the formula for momentum.

Discussion Status

The conversation is ongoing, with participants providing insights into the definitions of momentum and impulse. There is an acknowledgment of the relationship between impulse and change in momentum, but no consensus or resolution has been reached regarding the specific calculation of change in momentum when an object is stopped.

Contextual Notes

Participants note the absence of certain variables such as force and time in the problem setup, which may influence their approach to calculating impulse and momentum.

elissadi
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If you know the mass of an object and the speed of its motion, how do you calculate how large the impulse is when it is caught or stopped?
 
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The impulse is simply the change in momentum.

Do you know how to calculate momentum?
 
yes, momentum is p=mv, which would give me the "t" for impulse = Ft which would give me the impulse?
 
elissadi said:
yes, momentum is p=mv, which would give me the "t" for impulse = Ft which would give me the impulse?
As brewnog stated, the impulse equals the change in momentum. What's the change in momentum when the object is brought to rest. (No need to use F or t, luckily, since these are not given.)
 

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