Advertisements
Advertisements
Question
Draw a neat labelled diagram showing a pulley being used to lift a load. How are load and effort related in an ideal situation?
Solution
To raise a load, the load is attached to one end of the string and the effort is applied at the other end by pulling it is a downward direction . as shown in fig.
APPEARS IN
RELATED QUESTIONS
From the diagram given below. answer the question that follows:
1) What kind of pulleys are A and B?
2) State the purpose of pulley B.
3) What effort has to be applied at C just raise the load L = 20 kgf?
(Neglect the weight of pulley A and friction)
State whether the following statement is True or False.
A pulley changes the direction of force.
Explain how a gear system can be used to obtain Change in direction of rotation. Given one example.
The diagram below shows a pulley arrangement.
- Name the pulleys A and B.
- In the diagram, mark the direction of tension on each strand of string.
- What is the purpose of the pulley B?
- If the tension is T, deduce the relation between
- T and E, and
- E and L.
- What is the velocity ratio of the arrangement?
- Assuming that the efficiency of the system is 100%, what is the mechanical advantage?
What is the use of a fixed pulley?
What is a block and tackle system of pulleys?
Name a machine which is used to:
change the direction of force applied.
Draw the diagram of a single movable pulley and obtain its mechanical advantage, velocity ratio, and efficiency.
_______ is a machine made up of wheel and rope.
