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प्रश्न
What is a single movable pulley? What is its mechanical advantage in the ideal case?
उत्तर
WhSingle movable pulley: A pulley, whose axis of rotation is not fixed in position, is called a single movable pulley.
Mechanical advantage in the ideal case is 2.
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संबंधित प्रश्न
From the diagram given below. answer the question that follows:
1) What kind of pulleys are A and B?
2) State the purpose of pulley B.
3) What effort has to be applied at C just raise the load L = 20 kgf?
(Neglect the weight of pulley A and friction)
Answer the following in short.
Explain the various functions that a machine can perform.
Name a machine to change the direction of force ?
Explain how a gear system can be used to obtain Change in direction of rotation. Given one example.
In which direction does the force need to applied, when a single pulley is used with a mechanical advantage greater than one? How can you change the direction of force applied without altering its mechanical advantage? Draw a labelled diagram of the system.
Give reason for the following:
The lower block of a block and tackle pulley system must be of negligible weight
What is a block and tackle system of pulleys?
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 of pulleys has a velocity ratio of 4.
- Draw a labelled diagram of the system indicating clearly the points of application and directions of load and effort.
- What is the value of the mechanical advantage of the given pulley system if it is an ideal pulley system?
If the weight of the movable pulley is W, obtain the expression for MA, VR, and efficiency.
