PHYS 170 Lecture Notes - Lecture 28: Kurzweil K2000, Energy Economics, Elastic Energy
Document Summary
Problem 14-16 (homework) : block b is given an initial speed down the plane. block a moves up the plane. 40 kg. the coefficient of kinetic friction between a and the inclined plane is 0. 20. Solution stategy: write down a) energy balance equation for motion along block and b) equilibrium expression in in normal direction and eliminate tension. E. g: weight: work done by weight is independent of the path since it only depends on the relative vertical displacement of the initial and final points. In basic studies of dynamics, such as ours, we generally encounter two types of potential energy. 2. elastic potential energy (potential energy associated with compression or elongation of an elastic spring) Its weight w thus has positive potential energy, v g . Points to the plane corresponding to point at which crate is instantaneously at rest.
