Physics Problems - 1-D Motion - Solving Motion with Constant Acceleration Problems 2

A motorist traveling at a constant 15 m/s (54 km/h, or about 34 mi/h) passes a school crossing where the speed limit is 10 m/s (36 km/h, or about 22 mi/h). Just as the motorist passes the school-crossing sign, a police officer on a motorcycle stopped there starts in pursuit with constant acceleration 3.0 m/s^2. How much time elapses before the officer passes the motorist? At that time, what is the officer’s speed and how far has each vehicle traveled?
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