I'm stuck on a question about curvilinear motion using polar coordinates.
A car P travels along a straight road with a constant speed v = 100km/h (=27.8m/s). At the instant when the angle theta = 60 degrees (=pi/3 radians), determine the value of dr/dt in m/s and d(theta)/dt in deg/s.
Diagram: http://img706.imageshack.us/img706/371/diagramv.jpg
Answers: dr/dt = 13.89m/s and d(theta)/dt = -39.8 degrees/s
I am pretty bad at polar coordinates and would like to know the method for this question.
A car P travels along a straight road with a constant speed v = 100km/h (=27.8m/s). At the instant when the angle theta = 60 degrees (=pi/3 radians), determine the value of dr/dt in m/s and d(theta)/dt in deg/s.
Diagram: http://img706.imageshack.us/img706/371/diagramv.jpg
Answers: dr/dt = 13.89m/s and d(theta)/dt = -39.8 degrees/s
I am pretty bad at polar coordinates and would like to know the method for this question.
gotta pick the good nights to go out during it.