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1. ### Archived Optics - magnification of a converging lens

Optics -- magnification of a converging lens Homework Statement Dioptry of converging lens is $D=3$. What is magnification ##u##? Homework Equations The Attempt at a Solution ##\frac{1}{f}=D## - dioptry. \frac{1}{f}=\frac{1}{p}+\frac{1}{l} u=\frac{l}{p} l=up...
2. ### Mechanics problem

Homework Statement Homogeneous cube with one edge lying on the floor and the other on a smooth vertical wall. The underside of cube with a horizontal surface makes angle of π6 .What is the value to the coefficient of friction between the cube and the floor to cube remain in balance...
3. ### Mechanics statics problem

I mean in this case.
4. ### Mechanics statics problem

How to define \sum M=0?
5. ### Mechanics statics problem

Here is a picture
6. ### Mechanics statics problem

Any help? I think that this is picture
7. ### Mechanics statics problem

Homework Statement Homogeneous cube with one edge lying on the floor and the other on a smooth vertical wall. The underside of cube with a horizontal surface makes angle of \frac{\pi}{6}.What is the value to the coefficient of friction between the cube and the floor to cube remain in balance...