PH 101 Midterm: ph101_exam1_SOLN
Document Summary
Exam 1 solutions: a motorcycle is following a car that is traveling at constant speed on a straight highway. Initially, the car and the motorcycle are both traveling at the same speed of 18 m/s, and the distance between them is 92. 0 m. after 2. 50 s, the motorcycle starts to accelerate at a rate of 4. 00 m/s2. Solution: this was also problem 5b from homework 2 (hw average: 85. 9%, exam average 83. 7%). Since the car and motorcycle are moving at the same velocity until the moment the motorcycle accelerates, they will maintain a separation of xo = 92 m until the moment the motorcycle acceler- ates. In this case, the time of 2. 50 s is not relevant for solving the problem - it is only telling you when someone started measuring the motorcycle"s and car"s positions, and as such represents an arbitrary choice of origin.
