A speeder traveling at 40 mph (about 17.9 m/s) in a 25 mph zone approaches a parked police car. The instant the speeder passes the police car, the police begin their pursuit. If the speeder maintains a
constant velocity and the police car accelerates with a constant acceleration of 4.50 m/s2
, how long does
it take for the police car to catch the speeder?

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .