Physics

posted by .

A chain is held on a frictionless table with 1/3 of its length hanging over the edge. If the chain has length L = 33 cm and mass m = 21 g, how much work is required to pull the hanging part back onto the table?

  • Physics -

    11 cm = 0.11 m hung over the edge, and the center of mass of that part of the chain was 0.055 m below the edge.

    The work required to lift it all onto the table would be

    W = m g H =
    0.021 kg*g*(0.055 m) = ___ joules

  • Physics -

    0.11 m, so the center of mass of that part of the chain is 0.055 m below edge.

    W = mgH = (0.021/3)kg*g*(0.055) = ____J

    notice that the kg is different.

  • Physics -

    asdasd123123

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    One-fourth of length L is hanging down over the edge of a frictionless, table. The rope has an uniform, linear density (mass per unit length), lambda, and the end already on the table is held by a person. a) How much work does the …
  2. physics

    A chain of length l and mass ë per unit length is fully open and is held on a high frictionless table with y1 of its length hanging from the side of the table as shown in figure. When released, it starts slipping off the table. By …
  3. Calculus

    A chain 27 feet long whose weight is 74 pounds is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the entire chain to the top of the building?
  4. Physics

    A uniform chain of total mass m is laid out straight on a frictionless table and held stationary so that one-quarter of its length, L = 1.79 m, is hanging vertically over the edge of the table. The chain is then released. Determine …
  5. Physics

    A large uniform chain is hanging from the ceiling, supporting a block of mass 48kg. The mass of the chain itself is 15 kg, and the length of the chain is 2.6 m. The acceleration of gravity is 9.81 m/s^2 Find the tension in the chain …
  6. Calculus

    A chain 64 meters long whose mass is 20 kilograms is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the top 3 meters of the chain to the top of the building?
  7. Newton's law

    7. A uniform flexible chain of length l, with weight per unit length lamba, passes over a small, frictionless, massless pulley. It is released from a rest position with a length of chain x hanging from one side and a length l-x from …
  8. Physics

    a heavy metal chain of mass 0.60kg hangs over the edge of a table a)when half the chain is hanging over the edge,what is the magnitude of the net external force that causes the chain to accelerate?
  9. physics

    A 5 ft chain is sitting on a table with 2 ft hanging off (3 ft sitting on table). The table is 4 ft high, and the chain slides frictionless off the table. The chain weighs 15 lb. What is the velocity of the chain when it first hits …
  10. physics

    The figure above shows a chain being held on a table with one quarter of its length hanging over the edge. Friction is negligible. The chain has length L = 24 cm and mass m = 0.012 kg. Calculate how much work is required to pull the …

More Similar Questions