A car is traveling at a steady 90 km/h in a 50 km/h zone. A police motorcycle takes off at the instant the car passes it, accelerating at a steady 7.3 m/s/s.How much time elapses before the motorcycle is moving as fast as the car? How far is the motorcycle from the car when it reaches this speed?

Answer 1

90,000 m/3600 s = 25 m/s

v = a t
so
25 = 7.3 t
t = 3.42 seconds

distance car went = 25*3.42
distance cycle went = (25/2)* 3.42

(average speed is half max speed if a is constnt)

Answer 2

How'd you get 25? Where did the 3600 s come from?