anonymous
  • anonymous
A sports car moving at constant speed travels 110m in 5.0 seconds. If it then brakes and comes to a stop in 4.0 seconds, what is the acceleration in m/s^2? Express the answer in terms of "g's", where 1.00g=9.80m/s^2 The answers are -5.5m/s^2 and -0.56g's
Physics
chestercat
  • chestercat
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TuringTest
  • TuringTest
find the cars initial speed; the distance it covers in an amount of time, which is given at the beginning\[v_i=\frac d t=\frac{110}{5}\]then the formula for acceleration which is\[a=\frac{v_f-v_i}{t}\]where t in this equation is the time needed to stop, and the final velocity is zero.\[a=\frac{0-22}{4}\]divide this by 9.8 to get this in terms of g's

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