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Net Force and Motion

  1. Feb 22, 2010 #1
    1. The problem statement, all variables and given/known data

    The 'net force' in the statements below is the sum of ALL forces acting on the body.

    True or False

    1. During the collision of a car with a locomotive, the locomotive exerts an equal size force on the car as the car exerts on the locomotive.
    2. If two objects have the same acceleration, they are under the influence of equal forces.
    3. In order not to slow down, a bicycle moving at a constant velocity needs a small net force applied.
    4. If a net force acts on an object, the object's velocity will change.
    5. The net force which acts on an object which maintains a constant velocity is zero.
    6. If an object's speed does not change, no net force is acting on the object.

    2. Relevant equations

    Net Force = [tex]\sum[/tex]F

    3. The attempt at a solution

    1 Incorrect. (Try 1)
    True
    True
    True
    False
    False
    False

    2 Incorrect. (Try 2)
    False
    False
    True
    False
    True
    False

    3 Incorrect. (Try 3)
    True
    False
    False
    True
    False
    True

    4 Incorrect. (Try 4)
    False
    True
    False
    True
    False
    True

    5 Incorrect. (Try 5)
    False
    False
    False
    False
    False
    False

    6 Incorrect. (Try 6)
    False
    True
    True
    True
    False
    True
     
  2. jcsd
  3. Feb 22, 2010 #2
    Hi parson

    I think your third attempt was almost correct except for the (5)
     
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