- #1
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Homework Help Overview
The discussion revolves around a problem related to the momentum principle in physics, specifically involving the concepts of momentum change and net force. Participants are attempting to navigate the requirements for showing their work and reasoning in order to receive help.
Discussion Character
- Exploratory, Assumption checking, Problem interpretation
Approaches and Questions Raised
- Participants express confusion regarding their understanding of the problem despite prior experience in physics. Questions arise about the interpretation of net force and the relationship between parallel and perpendicular forces. There is also a request for clarification on the momentum equations presented.
Discussion Status
The discussion is ongoing, with participants seeking to clarify their understanding and the requirements for the homework. Some guidance has been offered regarding the need to show work and reasoning, and there is an exploration of different interpretations of the momentum principle.
Contextual Notes
Participants mention a deadline for the homework, indicating a time constraint that may affect their ability to engage fully with the problem. There is also a reference to specific equations related to momentum, which are being questioned in terms of their application.
- #2
SammyS
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Hello C R P. Welcome to PF !C R P said:
Please read the rules for this Forum.
We cannot give help without you showing your work or your reasoning as to why you gave your answers. (Also, you should not give solutions to other people who don not show work.)
Please explain why you checked or didn't check each answer. Please indicate what is expected of you on this exercise.
- #3
berkeman
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C R P said:
Check your PMs, and start showing your work (and explaining your proposed answers) here.
- #4
C R P
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Bloody Hell, I've done 2 years of physics but I'm just doing something wrong with problem yet it's so basic.
Any ideas on what I'm doing wrong??
*Is this good?
- #5
SammyS
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Not too bloody good.C R P said:
Which items are you sure of?
Which are you not very sure of, and why did you give those tentative answers.?
- #6
C R P
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Ah it's too late now the home work was due at 11:59
I know Δp=FnetΔt and ΔP=mv
One question i do have is whether force parralel +force perpindicular are considered F net or not I feel like it should be F|| cross Fp
I know Δp=FnetΔt and ΔP=mv
One question i do have is whether force parralel +force perpindicular are considered F net or not I feel like it should be F|| cross Fp
- #7
SammyS
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Written as vectors, as in the very first item: Yes, force parallel +force perpendicular = force, probably net force, depending on the contextC R P said:
What is the difference between the following two statements?
[itex]\displaystyle \vec{P}=\vec{F}_{\text{net}}\Delta t[/itex]
[itex]\displaystyle \vec{P}_\text{f}=\vec{P}_\text{i}+\vec{F}_{ \text{net}}\Delta t[/itex]
?[itex]\displaystyle \vec{P}_\text{f}=\vec{P}_\text{i}+\vec{F}_{ \text{net}}\Delta t[/itex]