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You are driving a car 33 down the road. The stoplight in front of you suddenly turns red and you slam on the brakes, skidding to a halt. You get out of the car and measure the skid marks made by your tires to be 23.5 meters (Assume positive x to be in the forward direction)

What is the acceleration of the car?
If your car were going twice the velocity, how far would it take to stop if the acceleration were the same as for part (B)?
How long would it take the car to stop if it were going at twice the velocity?

  • physics -

    vf^2=vi^2+2ad solve for a.

    wouldn't it take 4 times longer?

  • physics -


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