- #1
Differentiate it
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- Homework Statement
- Could someone help me out with this?
- Relevant Equations
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How does the mass of cylinder B compare to the mass of block A?
- Thread starter Differentiate it
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- Pulley pulley problem
AI Thread Summary
The discussion centers on comparing the mass of cylinder B to block A in a physics problem involving pulleys and strings. Participants emphasize the need for the original poster to share their attempts at solving the problem to receive effective help. There is a focus on defining variables related to the strings and understanding the relationships between their lengths. Questions are posed about the setup of the pulleys and their fixed positions to clarify the problem's parameters. Overall, the conversation aims to guide the original poster towards a clearer understanding of the mechanics involved.
- #2
SammyS
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Yes, someone can, but we need to see your attempt at solving this before we can begin to help.Differentiate it said:
- #3
Differentiate it
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Well I used the Net work done by a massless string thing and i seem to be getting 1.2 m/s instead of the 1.8 m/s shown in the answer keySammyS said:
- #4
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it helps to be very methodical with such questions.
Define variables for the lengths of string of interest. There's the string running from the large pulley to the rightmost pulley, the string from the centre if the large pulley to the other small pulley, the string running from the bottom of the large pulley to the bottom of that same small pulley, and the vertical string.
What fact relates those four lengths?
What fact relates the first two?
What fact relates the second and third?
Define variables for the lengths of string of interest. There's the string running from the large pulley to the rightmost pulley, the string from the centre if the large pulley to the other small pulley, the string running from the bottom of the large pulley to the bottom of that same small pulley, and the vertical string.
What fact relates those four lengths?
What fact relates the first two?
What fact relates the second and third?
- #5
SammyS
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That isn't much information regarding the specifics or your attempt. Rather than ask about how you used and obtained the Net work of the massless string, I'll ask some questions regarding the objects shown in the figure.Differentiate it said:
It looks like the two small pulleys are fixed in position relative to the bench/table. Is that correct?
Is the axel of the large pulley a fixed distance from block A ?
Is the string attached to the axel of the large pulley at one end and cylinder B at the other end?
Hello guys this is what I tried so far. I used the UTS to calculate the force it needs when the rope tears.
My idea was to make a relationship/ function that would give me the force depending on height. Yeah i couldnt find a way to solve it.
I also thought about how I could use hooks law (how it was given to me in my script) with the thought of instead of having two part of a rope id have one singular rope from the middle to the top where I could find the difference in height.
But the...
Here is what I tried
This question was actually asked in one of our engineering entrances.
The answer was 1D.
My teachers say that we have to use μₘ/fₘ to get to this answer. I cannot understand why. I'll be really glad if you could tell me the exact definition of power (numerically) that works in all scenarios.
TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance)
My thoughts for the first case , one of them must be 12 volt while the other is 0
The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
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