Problem A moving electron has a Kinetic Energy K1. After a net amount of work is done on it, the electron is moving one-quarter as fast in the opposite direction. What is the work done W in terms of K1? Solution To solve for the work done, first we must determine what is the final kinetic energy of the electron. By concept, we know that K1-(1/2)mv²1 K2=(1/2)mv2 But it was mentioned that: v1 so, K2 in terms of v1 is K2=( mv², Substituting the expression for K1 results to K2= Since work done is W=AK=K Evaluating results to W=( )K1
Problem A moving electron has a Kinetic Energy K1. After a net amount of work is done on it, the electron is moving one-quarter as fast in the opposite direction. What is the work done W in terms of K1? Solution To solve for the work done, first we must determine what is the final kinetic energy of the electron. By concept, we know that K1-(1/2)mv²1 K2=(1/2)mv2 But it was mentioned that: v1 so, K2 in terms of v1 is K2=( mv², Substituting the expression for K1 results to K2= Since work done is W=AK=K Evaluating results to W=( )K1
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter6: Energy Of A System
Section: Chapter Questions
Problem 44P
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