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2 braking times?

  1. Sep 15, 2004 #1
    Ok i have this problem and i have having trouble with it. It reads:

    A car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5m/s^2. the driver then applies the brakes, causing a uniform acceleration of -2.0m/s^2. If the brakes are applied for 3.0 seconds find: how fast the car is going at the end of the braking period, and how far it has gone

    i am confused as which is the initial time and the acceleration to use. i am lost, physics is my worst :frown:
     
  2. jcsd
  3. Sep 15, 2004 #2
    ok i figured out the first part of 1.5m/s as how fast the car is going at the end of the braking period. i just can't figure out the distance
     
  4. Sep 15, 2004 #3

    NateTG

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    What formulas do you have?
     
  5. Sep 15, 2004 #4
    the kinematic equations'
     
  6. Sep 15, 2004 #5

    NateTG

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    Can you figure out the distance that is traveled while the car is accelerating (before braking)?
     
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