Advertisements
Advertisements
प्रश्न
Write two uses of pulleys. Is pulley a force multiplier?
Advertisements
उत्तर
Two uses of pulley:
(i) To change the direction of application of force to a convenient direction.
(ii) To multiply force.
Yes, a pulley is a force multiplier
APPEARS IN
संबंधित प्रश्न
Answer the following in short.
Explain the various functions that a machine can perform.
Differentiate between a single fixed pulley and a single movable pulley.
Explain the working of a gear system.
What is a block and tackle system of pulleys?
The mechanical advantage of an ideal single movable pulley is ______.
State two reasons, why the efficiency of a pulley system is not 100 percent?
A type of single pulley is very often used as a machine even though it does not give any gain in mechanical advantage. Name the type of pulley used.
Draw a diagram of a single fixed pulley and obtain expressions for its:
(i) Mechanical advantage,
(ii) Velocity ratio, and
(iii) Efficiency, in the ideal case.
If the weight of the movable pulley is W, obtain the expression for MA, VR, and efficiency.
_______ is a machine made up of wheel and rope.
