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Suzie (of mass 76 kg) is roller-blading down
the sidewalk going 12 miles per hour. She
notices a group of workers down the walkway
who have unexpectedly blocked her path, and
she makes a quick stop in 1.9 seconds.
What is Suzie’s average acceleration

  • physics - ,

    Vo=12mi/h * 1600m/mi * 1h/3600s.=5.33m/s

    a=(V-Vo)/t = (0-5.33)/1.9=-2.807 m/s^2.

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