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A 1125 kg car was traveling at 20 m/s toward a traffic signal when the light suddenly turned red. The driver stomped on her accelerator, clearing the intersection in 1.7 seconds and coming to a speed of 24.6 m/s . What was the acceleration of the car?

Respuesta :

mberisso

Answer:

a = 3.88 m/s^2  (3.88 meters per second squared)

Explanation:

The acceleration of the car can be obtained based of the change of velocities  (from initial velocity "vi" to final velocity "vf") in the given amount of time:

In our case:

a = (26.6 - 20) / 1.7 = 3.88 m/s^2

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