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प्रश्न
State if the following statement is true or false. Correct the statement if it is false.
A single movable pulley is a pulley that has its axis of rotation fixed.
पर्याय
True
False
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उत्तर
False.
A single fixed pulley is a pulley that has its axis of rotation fixed.
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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)
Rohan exerts a pull of 150 kgf. What is the maximum load he can raise with this pulley system if its efficiency = 75%?
Is the above pulley system an ideal machine or not?
Fill in the blank:
A pulley is used to change ........................
Differentiate between a single fixed pulley and a single movable pulley.
What is a gear system ?
Explain how a gear system can be used to obtain gain in torque? Given one example.
Give two reasons why the efficiency of a single movable pulley system is not 100%.
The diagram below shows an arrangement of three pulleys A, B, and C. The load is marked as L and the effort as E.
- Name the Pulleys A, B, and C.
- Mark in the diagram the directions of load (L), effort (E) and tension T1 and T2 in the two strings.
- How are the magnitudes of L and E related to the tension T1?
- Calculate the mechanical advantage and velocity ratio of the arrangement.
- What assumptions have you made in parts (c) and (d)?
In the case of a block and tackle arrangement, the mechanical advantage increases with the number of pulleys. Explain.
