1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Tension HELP

  1. Jan 22, 2008 #1
    three blocks on a frictionless 45° ramp held together by massless ropes
    top block's mass, m1=1.00 kg.
    middle block's mass, m2=2.00 kg
    bottom block's mass, m3=3.00 kg.
    1. the force 'FE' is exerted on block one and is just enough to hold all the blocks in place
    find FE and the tensions of the ropes
    2. FE is no longer acting on the blocks so they slide down the ramp, find the acceleration of the blocks and the tensions in the ropes
    3. 2FE is now acting on block one, find acceleration of blocks and tensions in the ropes

    All I really need help with is the tension
  2. jcsd
  3. Jan 22, 2008 #2
    Basically it's the force coming from the rope

    So for example, the top block is sitting still for part 1 and has what amounts to 5kg of mass hanging on that segment of rope. Figure out the force of gravity going down the incline caused by the 5kg, that force will be the tension in the rope, it's how much force the rope has to apply to hold them there

    The tension in the other segment(connecting blocks 2 and 3), well that segment of rope is only supporting the 3 kg mass
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Tension HELP Date
Pulley-block-spring system Feb 15, 2018
Calculating tensions in ropes suspending an onject Jun 11, 2017
Help? Tension problem? Mar 18, 2017