A-kilogram car travels at a constant speed of 20. meters per second around a horizontal circular track. the diameter of the track is meters. the magnitude of the car's centripetal acceleration is:

The centripetal acceleration of the car is .

Explanation:

Let the mass of the car,

Diameter of the circular path, d = 100 m

Speed of car, v = 20 m/s

Radius, r = 50 m

When an object moves in a circular path, the centripetal acceleration acts on it. It is given by :

So, the centripetal acceleration of the car is . Hence, this is the required solution.

what experimental evidence led scientists to change from the previous model to this one?

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technology is the application of the knowledge gained by science.