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When a driver presses the brake pedal, his car can start with an acceleration of -5.4 m/s². How far will the car travel while coming to a complete stop if its initial speed was 25 m/s?

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The car will travel approximately 29.63 meters while coming to a complete stop.

To find the distance the car will travel while coming to a complete stop, we can use the equation:

vf^2 = vi^2 + 2ad

Where:

  • vf is the final velocity, which is 0 m/s in this case because the car comes to a complete stop
  • vi is the initial velocity, which is 25 m/s
  • a is the acceleration, which is -5.4 m/s² (negative because the car is decelerating)
  • d is the displacement, which is what we're trying to find

Plugging in the values we have:

0 = (25)^2 + 2(-5.4)d

Solving for d:

d = -((25)^2) / (2(-5.4))

After calculating, we find that d = 29.63 meters. So the car will travel approximately 29.63 meters while coming to a complete stop.

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