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Homework Help: Frictionless pulley

  1. Sep 29, 2008 #1
    There are actually 2 questions that i have
    1. The problem statement, all variables and given/known data
    First is
    a frictionless pulley with zero mass is attached to the ceiling, in a gravity field of 9.80 m/s2. Mass M2=0.250 kg is being accelerated downward with a=1.40m/s2. calculate the mass m1.
    Second is
    A small steel ball bearing with a mass of 24.0g is on a short compressed spring. when aimed vertically released, the spring sends the bearing to a height of 1.27m. calculate the horizontal distance the ball would travel if the same spring were aimed 35.0 deg from the horizontal

    2. Relevant equations
    so not so much wanting the answer just the equations on how to do these so then i can figure it out myself. thanks

    3. The attempt at a solution
  2. jcsd
  3. Sep 30, 2008 #2


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    Staff Emeritus
    Science Advisor
    Gold Member

    For the first problem a free body diagram will help you enormously.

    For the second problem you can find the initial velocity of the bearing from the info given and then use that with the kinematic equations to find the horizontal distance travelled if it was fired at an angle.
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