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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.
How will you determine the class of a lever. Give one example of these kinds of lever by drawing diagrams.
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Solution
The class of a lever is determined by identifying which component, Fulcrum (F), Load (L), or Effort (E), lies in the middle position between the other two.
The levers are of three kinds:
Class I levers that have fulcrum in between the load and the effort.
Eg. See - Saw
Class II levers which have load in between the fulcrum and the effort
Eg. - Nut - Cracker
Class Ill levers which have effort in between the fulcrum and the Load
Eg. - Forceps.
RELATED QUESTIONS
What is a lever?
Give one example of a class I lever where the mechanical advantage is more than 1.
Give one example of a class I lever in a case where the mechanical advantage is less than 1?
Name the class to which the following lever belong:
a see-saw
The diagram given below shows the three kinds of levers. Name the class of lever and give one example of the class.
Draw diagram to illustrate the position of fulcrum, load, and effort, of the following:
a nutcracker
How can you increase the mechanical advantage of a lever?
Name the machine to which the following belong:
Sugar tongs
Answer the following.
What is a Class I lever?
What is the use of the lever if its mechanical advantage is
- more than 1,
- equal to 1, and
- less than 1?
Both a pair of scissors and a pair of pliers belong to the same class of levers. Name the class of lever. Which one has the mechanical advantage less than 1?
Which type of lever has a mechanical advantage always more than one? Give one example. What change can be made in this lever to increase its mechanical advantage?
Explain why the mechanical advantage of the class III type of lever is always less than 1.
Class III levers have mechanical advantage less than one. Why are they then used?
Classify the following into levers:
A catapult
Classify the following into levers:
Wheel barrow
Classify the following into levers:
A fishing rod
Name the load, effort, and fulcrum.
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1. ______ 2. ______ 3. ______ |
1. ______ 2. ______ 3. ______ |
1. ______ 2. ______ 3. ______ |
second-order lever ______.
