Recent content by Senseiofj

So, I need to create a physics demonstration that highlights a concept of introductory physics out of household items. Does anybody know of any good ones I could use?

Thanks a lot, man. I get it now.

I think I should do this working purely without numbers, so I can just plug my figures in, I suppose. I have the height of the end of the plank when the brick started sliding, the length of the plank, Speed of the brick, Mass, Weight, Fn, and the Fp [the force in the plane], I also have µ...

Homework Statement A brick is on a 121 cm plank, and the plank is lifted gradually until the brick begins to slide, when the plank is lifted 48cm in the air at an angle of 30º. I need to find the Frictional Force, and µ kinetic. How do I find these things knowing only these three things...