A car traveling at 21 m/s accelerates up to 28 m/s over a distance of 80 meters. Calculate the acceleration rate of the car over the given distance.

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

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