college physics

A commuter backs her car out of her garage with a constant acceleration of 1.20 m/s2.
(a) How long does it take her to reach a speed of 1.60 m/s?

s
(b) If she then brakes to a stop in 0.8 s, what is her (constant) deceleration?

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  1. v = a t
    1.6 = 1.2 t
    t = 1.33 seconds

    Vi = 1.60
    v = Vi + a t
    0 = 1.60 + a * 0.8
    a = - 2 m/s^2

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    posted by Damon
  2. i forgot

  3. Are you Daniel Spry?

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    posted by Mary

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