Simple angular momentum question

AI Thread Summary
The discussion centers on calculating the angular momentum of a rectangular solid, specifically a meterstick, about its center. The formula presented is (1/12)m(a^2+b^2), where 'a' is the width and 'b' is the thickness. Participants confirm that this formula is indeed correct for the moment of inertia. The conversation clarifies that the original question pertains to the moment of inertia rather than angular momentum. The thread concludes with an acknowledgment of the correct terminology.
itzela
Messages
34
Reaction score
0
hey guys... I'm unsure about the angular momentum of a rectangular solid (such as a meterstick) about it's center... I came up with (1/12)m(a^2+b^2) with a being the width and b thickness, is this correct?
 
Physics news on Phys.org
...thanks!
 
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
Back
Top