1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    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!

Homework Help: 1) A rope 5m is fastened to two hooks 4m apart on a horizontal

  1. Oct 27, 2011 #1
    1) A rope 5m is fastened to two hooks 4m apart on a horizontal ceiling. To the rope is attached a 10kg mass so that the segment of the rope are 3.0m and 2.0m.Compute the tension in the string.
    2) A uniform pole 7m long weighing 10kg is supported by a boy 2m from one end and a man 3m from the other end. At what point must 20kg weight be attached so that the man would support thrice as much weight as the buy
    3)A man carries a load of mass 2.6kg from one end of a uniform pole 100cm which has a mass 0.4kg the pole rests on his shoulder at a point 60cm from the load he holds it at the other hand what vertical force must be applied by his hand and what is the force on his shoulder.

    Rule of equilibrium under parallel complanor force
    Total downward forces = total upward forces
    total anticlockwise moment= total clockwise moment
    moment= force x perpendicular distance to line of action.
  2. jcsd
  3. Oct 27, 2011 #2
    Re: Equilibrium

    My attempt

    Attached Files:

  4. Oct 27, 2011 #3
    Re: Equilibrium

    You have to imagine that you are hanging the mass as directed in the problem. Try to do that and you get the correct diagram.
  5. Oct 27, 2011 #4
    Re: Equilibrium

    OK but what's the formula for computing tension?
  6. Oct 27, 2011 #5
    Re: Equilibrium

    It all starts from the diagram according to the way I know how to do it.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook