Physics
What is a fixed pulley? State its one use.
Machines
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Answer
A pulley, which has its axis of rotation stationary in position is called a fixed pulley.
A fixed pulley is used to change the direction of effort to be applied. It is used for lifting small load such as a water bucket.
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Related Questions
Name a machine which is used to:
(a) multiply force
(b) multiply speed, and
(c) change the direction of force applied.
State whether the following statements are true or false.
(a) The velocity ratio of a single fixed pulley is always more than 1.
(b) The velocity ratio of a single movable pulley is always 2.
(c) The velocity ratio of a combination of n movable pulleys with a fixed pulley is always 2n.
(d) The velocity ratio of a block and tackle system is always equal to the number of strands of the tackle supporting the load.
Name the pulley which has no gain in mechanical advantage. Explain, why is such a pulley then used?
What is a single movable pulley? What is its mechanical advantage in the ideal case?