मराठी

A block and tackle system of pulleys has velocity ratio 4. Draw a labelled diagram of the system indicating clearly, the direction of the load and effort. Calculate the potential energy of the load - Physics

Advertisements
Advertisements

प्रश्न

A block and tackle system of pulleys has velocity ratio 4.

  1. Draw a labelled diagram of the system indicating clearly, the direction of the load and effort.
  2.  Calculate the potential energy of the load 100 kgf lifted by this pulley to a height 5 m. (g = 10 ms-2)
आकृती
संख्यात्मक

उत्तर

  1. Pulley drawn correctly with support.
    Correct connection of tackle, Marking load, effort with correct direction and tension.
  2. U = mgh = 100 × 10 × 5
    U = 5000 J
shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2024-2025 (April) Specimen Paper

संबंधित प्रश्‍न

Select the correct alternative:

A pulley is used because of it


Explain how a gear system can be used to obtain gain in torque? Given one example.


Define the following term in reference to a gear system of Driving gear ?


There is no gain in mechanical advantage in the case of a single fixed pulley. Explain, why the pulley is then used?


In the case of a block and tackle arrangement, the mechanical advantage increases with the number of pulleys. Explain.


A type of single pulley is very often used as a machine even though it does not give any gain in mechanical advantage. For what purpose is such a pulley used?


The pulley system shown in the figure is to be used to lift a load W. If the man applying the effort cannot apply a force exceeding 1000 N, what is the maximum load that can be lifted?
The actual load that the man is finally able to lift turns out to be 2700 N. What are the values of the actual M.A., obtained, and the efficiency of the actual set-up?


The alongside figure shows the combination of a movable pulley P1 with a fixed pulley P2 used for lifting up a load W.

(i) State the function of the fixed pulley P2.
(ii) If the free end of the string moves through a distance x, find the distance by which the load W is raised.
(iii) Calculate the force to be applied at C to just raise the load W = 20 kgf, neglecting the weight of the pulley P1 and friction.


A man raises a load of 360 kgf using a block and tackle system of 3 pulleys. If the efficiency of the pulley system is 60%, what effort is applied by the man?


A ‘block and tackle’ system used 3 pulleys in the lower block and 4 pulleys in the upper block. What is the ‘velocity ratio’ of this system? If the load is to be lifted by a person capable of applying a maximum effort of 1000 N, what is the maximum load than can be lifted under ideal conditions?
The actual maximum load that gets lifted turns out to be 6300 N. What are the values of the actual M.A. and efficiency of the set-up?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×