Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
(a)

(b) M. A. = `"Load"/"Efforts" = (4"T"_"L")/"T"_"E" = 4`
APPEARS IN
संबंधित 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.
Solve the following numerical problem.
What effort will be required to lift a load of 500 N by a single movable pulley? [Hint: Mechanical advantage of a single movable pulley is two].
Explain the working of a gear system.
Give two reasons why the efficiency of a single movable pulley system is not 100%.
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.
What is a block and tackle system of pulleys?
Give reason for the following:
The efficiency of a pulley is always less than 100%
Name a machine which is used to:
change the direction of force applied.
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?
Draw the diagram of a single movable pulley and obtain its mechanical advantage, velocity ratio, and efficiency.
