Change of Momentum - General Physics - Past Paper, Exams of Physics

Download Change of Momentum - General Physics - Past Paper and more Exams Physics in PDF only on Docsity! St. Vincent College PH 111: General Physics I Exam IV 11/10/2006 The exam consists of 5 questions. The questions may not be worth the same number of points, read the entire exam before beginning work. Put your name on all pages. Problem 1 20 Problem 2 20 Problem 3 30 Problem 4 30 Total 100 1. (20 pts) a) (5 pts) Explain how you could tell whether or not a force is conservative. b) (5 pts) Can a force applied in the x direction cause a change of momentum in the y direction? Explain. c) (5 pts) Give a physical reason that kinetic energy can never be negative. In other words, do not use the argument that v2 is always zero or positive. d) (5 pts) Is it possible for the energy of a non-isolated system to remain constant even if it is exchanging energy with the surroundings? If not, explain why not. If so, explain why and give an example.