2-69.  The two cars in Figure 2-39 start from rest at t = 0 and each accelerates at a constant rate until it crosses the finish line. If car A takes 20% longer than car B to cross the finish line,

a.   how do the speeds at which the two cars cross the finish line compare? Express your answer as vA = _________ vB. (Write the correct numerical multiplier in the blank.) b.   how do the accelerations of the two cars compare? Express your answer as aA = _________ aB. (Write the correct numerical multiplier in the blank.)

Figure 2-39  Problem 2-69

Copyright © 2004 by John Wiley & Sons, Inc. or related companies. All rights reserved.