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प्रश्न
A pulley system has a velocity ratio of 4 and an efficiency of 90%. Calculate:
(i) the mechanical advantage of the system.
(ii) the effort required to raise a load of 300 N by the system.
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उत्तर
VR = 4, η = 90%
(i) MA = VR × η%
`=(4xx90)/100=3.6`
(ii) MA =`"Load"/"Effort"`
∴ Effort =`"Load"/"MA"`
`=300/3.6`
= 83.33 N
संबंधित प्रश्न
State whether the following statement is True or False.
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Draw a neat labelled diagram showing a pulley being used to lift a load. How are load and effort related in an ideal situation?
Answer the following in detail.
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Define the following term in reference to a gear system for Gear ratio ?
Define the following term in reference to a gear system for Gain in speed ?
Define the following term in reference to a gear system for Gain in torque ?
Draw a diagram of a combination of three movable pulleys and one fixed pulley to lift up a load. In the diagram, show the directions of load, effort and tension in each strand. Find:
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- efficiency of the combination in ideal situation.
What is a block and tackle system of pulleys?
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?
