Question 26 to 30

26.
Ans.

Example: a bottle opener.

27.
Ans.

The wheel barrow is a class II lever. One more example of this class is a nut cracker.

29.
Ans.
Classes III levers always have mechanical advantage less than one.
Diagram:

30.
Ans.
In these types of levers, the effort is in between the fulcrum F and the load L and so the effort arm is always smaller than the load arm. Therefore M.A. < 1.

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