demo_hi
10-26-2011, 05:43 PM
http://faculty.rwu.edu/mstein/ENGR220/notes/Exam1S02_files/image002.jpg
A motorcycle patrolman starts from rest at 2 seconds after a car, traveling at a constant rate of 120 km/h passes point A. The patrolman accelerates at 6m/s2 until he reaches the maximum permissible speed of 150km/h and then maintains that speed. a) Sketch s-t, v-t and a-t graphs for the car and the motorcycle. b) Calculate the distance from point A that the patrolman overtakes the car. c) What is the distance between the motorcycle and car 4 seconds after the car passes point A. Reminder: convert all speeds to m/s, do not mix values of m/s and km/h :(249)::(249):
A motorcycle patrolman starts from rest at 2 seconds after a car, traveling at a constant rate of 120 km/h passes point A. The patrolman accelerates at 6m/s2 until he reaches the maximum permissible speed of 150km/h and then maintains that speed. a) Sketch s-t, v-t and a-t graphs for the car and the motorcycle. b) Calculate the distance from point A that the patrolman overtakes the car. c) What is the distance between the motorcycle and car 4 seconds after the car passes point A. Reminder: convert all speeds to m/s, do not mix values of m/s and km/h :(249)::(249):