Physics

A sports car moving at constant speed travels 150 meters in 5.4 seconds , then brakes and comes to a stop in 3.9 seconds

What is the magnitude of its acceleration in ?

What is the magnitude of its acceleration in g's (g= 9.80 m/s^2 )?

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asked by Tanner
  1. initial velocty=150/5.4 m/s

    a= changevelocity/time=Vi/3.9

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  2. a=(Vf-Vi)/t
    Vf=0 (it stopped moving)
    Vi=(150/5.4)m/s=28m/s
    total t = 9.3s
    so
    a=(0-28)/9.3 = 3 m/s

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    posted by K

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