1) What would the average acceleration be for a car at a stoplight that speeds up to 20 m/s in 10 seconds (in m/s^2)

2) Imagine that a car traveling at 100 m/s must slam on the brakes to avoid hitting a raccoon. If it takes 4 seconds for the car to slow down to a stop, what is its acceleration (in m/s^2)

Question

Sanai Snow

Physics

3 April, 15:25

1) What would the average acceleration be for a car at a stoplight that speeds up to 20 m/s in 10 seconds (in m/s^2)

2) Imagine that a car traveling at 100 m/s must slam on the brakes to avoid hitting a raccoon. If it takes 4 seconds for the car to slow down to a stop, what is its acceleration (in m/s^2)

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Answers (1)

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Adolfo Campos · Answer 1

1.)

Velocity is in m/s, and acceleration is in m/s^2 like you said. Because of this, we can calculate this by dividing the speed by the time it took to get to that speed.

(20 meters/second) / 10 seconds = 2 meters / second^2

2.)

Same thing with the first one.

(100 meters/second) / 4 seconds = 25 meters / seconds^2