- #1
pebbles
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Review time; came across that question in the text...I DON'T KNOW!
...i hate this class.
:"[
...i hate this class.
:"[
AI Thread Summary
The discussion revolves around a challenging physics question regarding the work done on a block sliding up a frictionless plane. Participants clarify that the block is indeed slowing down as it ascends, which is supported by the work-energy theorem stating that work equals the change in kinetic energy. Since the force of gravity acts in the opposite direction to the block's displacement, the work done on the block is negative. This negative work indicates a decrease in kinetic energy as the block moves upward. Overall, the conversation highlights the application of the work-energy theorem in understanding the dynamics of the block's motion.
In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question.
Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point?
Lets call the point which connects the string and rod as P.
Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
This problem is two parts. The first is to determine what effects are being provided by each of the elements - 1) the window panes; 2) the asphalt surface. My answer to that is
The second part of the problem is exactly why you get this affect.
And one more spoiler:
Let's declare that for the cylinder,
mass = M = 10 kg
Radius = R = 4 m
For the wall and the floor,
Friction coeff = ##\mu## = 0.5
For the hanging mass,
mass = m = 11 kg
First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on.
Force on the hanging mass
$$mg - T = ma$$
Force(Cylinder) on y
$$N_f + f_w - Mg = 0$$
Force(Cylinder) on x
$$T + f_f - N_w = Ma$$
There's also...
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