A toy train rolling on a straight stretch of tracks, initially going 0.31 m/s slows uniformly to 0.14 m/s in 17 s.  It then speeds up with a constant acceleration of magnitude 0.068 m/s2 over a distance of 4.2 m. iii) What was the total time for all this (slowing down and then speeding up)

7) A speeding motorist traveling 30 m/s passes a stationary police officer. The officer immediately begins pursuit at a constant acceleration of 3 m/s². a) How much time will it take for the police officer to reach the speeder? b) What is the velocity of officer when he catches the speeder? c) Plot two graphs, show the displacement vs. time for both motorist and police in one graph and velocity vs. time for both of them in a the other graph.

what is the answer for the first qustion?

A toy train rolling on a straight stretch of tracks, initially going 0.31 m/s slows uniformly to 0.14 m/s in 17 s.  It then speeds up with a constant acceleration of magnitude 0.068 m/s2 over a distance of 4.2 m. ii) What is its final speed after speeding up for the last 4.2 m

2. Two cars are drag racing. The red car accelerates at a rate of 4.7 m/s', and the blue car at a rate of 3.9 m/s’. The blue car starts 1.5 s before the red. Find the time it takes for the red car to be at the same position as the blue car, how the cars have traveled, and how fast each is moving at this time.

You are driving at night on a straight path at 70MPH. Suddenly, a dog appears in your headlights 35 meters away. You immediatley apply the brakes which causes your car to slow down at a constant rate, coming to rest just before making contact with the dog.  1 mile = 1.61 km 1) How long did it take for your car to make a complete stop?  2) If you were initially driving in the 'positive x' direction, then what was your acceleration during the braking maneuver, in vector form and in m/s2?

1.) What is the total displacement of the jogger from t = 0 to t = 0.6 hours? 2.) What is average velocity of the jogger from t = 0 to t = 0.6 hours?