PHYS 1A Lecture Notes - Lecture 15: Potential Energy, Kinetic Energy, Momentum
Document Summary
A closed system - no exchange of energy with its environment - mechanical energy is conserved. Can use to solve for forces, displacements, velocities, masses, spring constants, and resistive forces week 7 page 1. Mass-spring system with a 10 kg mass attached to the spring. If compressed from equilibrium to a position xmax. When it is released, at what point is the ratio of the ke to pe equal to 1. 0? week 7 page 2. The first hiker takes a steep, direct route and gets to the top in about 1 hour. The other takes a more gentle sloping route that is 4 times longer, but can walk 2 times faster and makes it to the top in 2 hours. The power expended by the first hiker is twice as large as the power expended by the second hiker. Impulse: area under the curve of f versus t.
