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Find acceleration of car attached to spring scale

  1. Mar 3, 2005 #1
    A 20.8 kg mass attached to a spring scale rests
    on a smooth, horizontal surface. The spring
    scale, attached to the front end of a boxcar,
    reads T = 38.7 N when the car is in motion. If the spring scale reads zero when the car is at rest, determine the acceleration of the
    car, when it is in motion.
  2. jcsd
  3. Mar 3, 2005 #2
    Use Newton's 2nd law?
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