Advertisements
Advertisements
Question
Give reason for the following:
In case of a block and tackle arrangement, the mechanical advantage increases with the increase in the number of pulleys.
Advertisements
Solution
This is because mechanical advantage is equal to the total number of pulleys in both the blocks.
RELATED QUESTIONS
What is the mechanical advantage of an ideal pulley?
Name a machine to change the direction of force ?
Explain how a gear system can be used to obtain gain in speed? Given one example.
Define the following term in reference to a gear system of Driving gear ?
Define the following term in reference to a gear system for Driven gear ?
In the case of a block and tackle arrangement, the mechanical advantage increases with the number of pulleys. Explain.
What is the relation between the mechanical advantage and the number of strands of string used to support the load, in a ‘block and tackle’ set-up?
What is a block and tackle system of pulleys? What precautions would you observe while rounding the string so that the effort is applied in the downward direction?
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?
