Posted by Sat on Saturday, September 14, 2013 at 10:43am.
A motorist traveling with constant speed of vc = 16.0 m/s passes a schoolcrossing corner, where the speed limit is 10 m/s. Just as the motorist passes, a police officer on a motorcycle stopped at the corner starts off in pursuit. The officer accelerates from rest at am = 2.67 m/s2 until reaching a speed of 26.7 m/s. The officer then slows down at a constant rate until coming alongside the car at x = 240.0 m.
Consider a coordinate system with origin at the schoolcrossing corner, x=0, and the +xaxis in the direction of the car's motion.
(a) How long does it take for the motorcycle to catch up with the car (in s)?
unanswered
(b) How long does it take for the motorcycle to speed up to 26.7 m/s? (Express your answer in s.)
unanswered
(c) How far (in m) is the motorcycle from the corner when switching from speeding up to slowing down?
unanswered
(d) How far (in m) is the motorcycle from the car when switching from speeding up to slowing down?
unanswered
(e) What is the acceleration (in m/s2) of the motorcycle when slowing down? (pay attention to the sign)

physics  kl, Wednesday, June 8, 2016 at 4:58pm
jk