Rotational Dynamics: Solve Problem & Get Help

AI Thread Summary
The discussion revolves around a problem in rotational dynamics where a user seeks guidance. Participants suggest drawing a diagram to visualize the forces involved, including normal forces and friction. They recommend breaking down the forces into components or moments for better analysis. The emphasis is on understanding the forces acting on the system to solve the problem effectively. Clear visualization and proper force analysis are key to addressing the issue.
boberth2o
Messages
9
Reaction score
0
There is this problem that I am having trouble with, can someone guide me through this problem. Thanks

http://img227.imageshack.us/img227/2681/scan0003eq3.png
 
Last edited by a moderator:
Physics news on Phys.org
Hi boberth2o! :smile:

Draw the board with the forces added … that's a normal force at wall 1, and both a normal and friction force at wall 2, and of course the weight.

Then take components, or moments, as appropriate. :smile:
 
Thread 'Variable mass system : water sprayed into a moving container'
Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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...
Back
Top