A driver of a car in motion sees a deer on the road. The driver hits the brakes which provide an acceleration of -7.0 m/sec^2. If the car’s initial velocity was 25 m/sec, how far will the car travel before coming to a stop?

Under constant acceleration, we have

where is final velocity, is initial velocity, is acceleration, and is distance.

Solving for gives

Then if the car starts with speed 25 m/s and acceleration -7.0 m/s², and comes to a rest (so that ), we have

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explanation:

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