Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

A sledge loaded with bricks has a total mass of 18.0 kg

  1. Sep 25, 2003 #1
    [?] A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at a constant speed by a rope. the rope is inclined at 20 deg above the horizon surface and the sledge moves a distance of 20.o m on a horizontal surface. what is the tension of the rope. How do you find tension is there an equation for it or does it just depend on the problem. help would be greatly appreciated
    Last edited by a moderator: Feb 6, 2013
  2. jcsd
  3. Sep 26, 2003 #2


    User Avatar
    Science Advisor

    The tension in the rope is the force the rope exerts on the sledge.

    You do have one problem: no matter how heavy the sledge is, if there is NO friction, it is not necessary to exert ANY force to keep the sledge moving. Are you given a "coefficient of friction"? If so then the horizontal force will be that coefficient times the WEIGHT of the sledge (not its mass). After you have found that, use trigonometry to find the force the rope has to exert. (The rope is the hypotenuse of a right triangle. The horizontal force is the horizontal leg of that triangle.)
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook