Four simple machines are given below. Identify the pair of simple machines that belong to class II levers.

A

and

B

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C

and

D

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B

and

C

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D

and

A

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Solution

The correct option is B $B$ and $C$
A class II lever has the load between effort and fulcrum . In fig. B and C load is between effort and fulcrum , therefore they are class II levers .
A class I lever has the fulcrum between effort and load . In fig. A and D fulcrum is between effort and load , therefore they are class I levers .

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I I

I I I

Answer the following questions :

(a) What are simple machines? Give examples.

(b) What are the advantages of using a machine?

(d) What can you use as an inclined plane?

(e) What is meant by a lever?

(f) What is meant by a complex machine? Give an example.

(g) How many types of levers are there? On what basis are they classified?

(h) What should we do to take care of machines?

Fulcrum (F), load (L), and effort (E) of a simple machine lies in a line. Among the given options which arrangement is correct for class II lever.

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