Advertisements
Advertisements
प्रश्न
_______ is a machine made up of wheel and rope.
पर्याय
Ramp
Simple machines
Work
Energy
Pulley
उत्तर
Pulley is a machine made up of wheel and rope.
APPEARS IN
संबंधित प्रश्न
What is the justification for using the pulley then ?
Name the type of single pulley that can act as a force multiplier. Draw a labelled diagram of the pulley mentioned by you.
Give two reasons why the efficiency of a single movable pulley system is not 100%.
What is a block and tackle system of pulleys?
Give reason for the following:
The lower block of a block and tackle pulley system must be of negligible weight
The diagram below shows a pulley arrangement :
(i) Copy the diagram and mark the direction of tension on each strand of the string.
(ii) What is the velocity ratio of the arrangement ?
(iii) If the tension acting on the string is T, then what is the relationship between T and effort E ?
(iv) If the free end of the string moves through distance x, find the distance by which the load is raised.
The diagram below shows a pulley arrangement.
(i) In the diagram, mark the direction of the forces due to tension, acting on the pulley P.
(ii) What is the purpose of the pulley Q?
(iii) If the tension is T newton, deduce the relation between T and E.
(iv) Calculate the velocity ratio of the arrangement.
(v) Assuming that the efficiency of the system is 100%, what is the mechanical advantage?
(vi) Calculate the value of E
Name a machine which is used to:
change the direction of force applied.
Write two uses of pulleys. Is pulley a force multiplier?
If the weight of the movable pulley is W, obtain the expression for MA, VR, and efficiency.
