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Duely Cack
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1. A 75-g phonograph album of 30-cm diameter spins at 33.3 rpm. What is its kinetic energy?
Kinetic Energy Of an rotating object
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AI Thread Summary
To calculate the kinetic energy of a rotating object, the moment of inertia must first be determined. The kinetic energy formula for rotation is given by 1/2 I ω², where I is the moment of inertia and ω is the angular velocity in radians per second. For a phonograph album, the moment of inertia can be calculated based on its mass and diameter. The discussion highlights the need to convert the album's rotation speed from RPM to radians per second for accurate calculations. Understanding these principles is essential for solving the kinetic energy problem effectively.
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...
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...
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