Question

Statements given below are incorrect . Write the correct statement :-

1) In case of lever of third order , the effort arm is always longer than the low arm .
2) A kitchen knife is an example of lever of third order .
3)A wheel barrow is an example of lever of first order .
4) A single fixed Pulley is superior than a single movable pulley .
5) A hand grinder exam example of a pulley .

Correct answer will mark as bring list ,wrong answer will be reported
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Answer 1

Answer:

The correct statements are:

1. In the case of lever of the third order, the effort arm is always less than the load arm.

(In the 2nd statement, it depends on how you are using it.)

2. A kitchen knife is an example of a lever of third order. [is correct since as effort is in between load and fulcrum.]

3. A wheelbarrow is an example of the lever of the second-order lever. [as the load is between the fulcrum and effort, hence it is a second class lever.]

4. A single fixed pulley is less superior than a single movable pulley. [as single movable pulley has a mechanical advantage more than 1.]

5.  A hand grinder is an example of a wheel and axle type of simple machine.

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Answer 2

Answer:

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