Advertisements
Advertisements
Question
State three differences between the three classes of levers.
Advertisements
Solution
| Class I | Class II | Class III | |
| 1. | It has the fulcrum between the load and effort. | It has the load between the fulcrum and effort. | It has an effort between the fulcrum and the load. |
| 2. | The effort arm can be shorter, equal to or longer than the load arm. | The effort arm is bigger than the load arm. | The effort arm is always shorter than the load arm. |
| 3. | The mechanical advantage can be less than, equal to, or greater than 1. | The mechanical advantages are always greater than 1. | The mechanical advantages are always less than 1. |
| 4. | The load and effort are in the same direction. | The load and effort are in opposite directions. | The load and effort are in opposite directions. |
APPEARS IN
RELATED QUESTIONS
Describe three orders of levers giving an example of each. Draw neat diagrams showing the positions of fulcrum, load, and effort in each kind of lever.
Which class of lever has the mechanical advantage always more than 1? Give an example.
Give one example of a class I lever in a case where the mechanical advantage is less than 1?
Draw diagram to illustrate the position of fulcrum, load, and effort, of the following:
a pair of forceps
Name the machine to which the following belong:
Sugar tongs
A lever of length 100 cm has the effort of 15 kgf at a distance of 40 cm from the fulcrum at one end. What load can be applied at its other end?
Answer the following in a word or two or in a sentence.
Given an example of a Class I lever.
Answer the following in short.
What is the basis of the classification of levers?
Match the following:
| 1. | Class I lever | a. | Wheelbarrow |
| 2. | Class II lever | b. | Seesaw |
| 3. | Class III lever | c. | Axe |
| 4. | Wedge | d. | Hockey sick |
A ______ lever will always have M.A. > 1.
