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प्रश्न
A block and tackle pulley system has a velocity ratio 5. Draw a labelled diagram of this system. In your diagram, indicate clearly the points of application and the directions of the load and effort.
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उत्तर
संबंधित प्रश्न
Is the above pulley system an ideal machine or not?
Fill in the blank:
A pulley is used to change ........................
Answer the following in detail.
How does a pulley make work simpler?
Define the following term in reference to a gear system for Driven gear ?
Give two reasons why the efficiency of a single movable pulley system is not 100%.
Give reason for the following:
In a single fixed pulley, the velocity ratio is always more than the mechanical advantage.
Name the type of single pulley that can act as a force multiplier. Draw a labeled diagram of the pulley mentioned by you.
State two reasons, why the efficiency of a pulley system is not 100 percent?
A boy lifts a load of 40 kgf through a vertical height of 2m in 5s by using a single fixed pulley when he applies an effort of 48 kgf. Calculate:
(i) the mechanical advantage, and
(ii) the efficiency of the pulley. Why is the efficiency of the pulley is not 100%?
(iii) the energy gained by the load in 5s, and
(iv) the power developed by the boy in raising the load.
