As an v to a final velocity, _{1}v over a distance, _{2,}d. Today we’ll begin using the to see if Santa was able to keep to his Christmas delivery schedule and get all the good boys and girls their gifts in time.Work-Energy Theorem Before we can work with the ,kinetic energy
where, The equation behind the
KE (2)_{1}where KE its final kinetic energy after it has slowed or stopped. In cases where the object has come to a complete stop _{2}KE is equal to zero, since the velocity of a stationary object is zero._{2}In order to work with equation (2) we must first expand it into a more useful format that quantifies an object’s mass and initial and final velocities. We’ll do that by substituting equation (1) into equation (2). The result of that term substitution is,
× m × v] (3)_{1}^{2}Factoring out like terms, equation (3) is simplified to,
v] (4)_{1}^{2} Now according to de Coriolis, F, times distance, d. So substituting these terms for W in equation (4), the expanded version of the becomes,Work-Energy Theorem
v] (5)_{1}^{2}Next time we’ll apply equation (5) to Santa’s delivery flight to calculate the strength of that gust of wind slowing him down. Copyright 2015 – Philip J. O’Keefe, PE Engineering Expert Witness Blog ____________________________________ |