Aspeeder is driving down the road at a constant 15 m/s, passes a police officer parked on the roadside. the officer pauses 9 seconds, then pursues the speeder, accelerating at a constant 5 m/s^2.
how much time does it take the police officer to catch the speeder?
how far did the police officer drive before the speeder was caught?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.