> #mechanics , #physics > The diagram in fig.1 shows the use of a lever.state the principle of moments as applied in fig.1.which class of levers is that? Give an example of the class of levers in fig.1.If FA =100CM,AB=90CM,ca?
Jul 16

# The diagram in fig.1 shows the use of a lever.state the principle of moments as applied in fig.1.which class of levers is that? Give an example of the class of levers in fig.1.If FA =100CM,AB=90CM,ca?

Lculate the minimum effort required to lift the load.list three important prices of information from the rebar chart that the iron-workers are required to know.explain the difference between deformed reinforcement bars and plain reinforcement bars. Uses of a rebar detailer?
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Jul 16
The principle of moments states that for an object to be in equilibrium, the sum of the clockwise moments about a point must be equal to the sum of the anticlockwise moments about the same point.

The class of lever shown in fig.1 is a first-class lever. In a first-class lever, the fulcrum is located between the effort (force applied) and the load (resistance).

An example of a first-class lever in fig.1 is a seesaw or a crowbar.

To find the distance CA, we can use the principle of moments:

Clockwise moment = Anticlockwise moment
FA x AB = CA x FB
100 x 90 = CA x 50
9000 = 50CA
CA = 9000 / 50
CA = 180 cm

Therefore, the distance CA is 180 cm.
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Jul 16
Principle of Moments:
In a lever, the moment of the force on one side of the fulcrum is equal to the moment of the force on the other side of the fulcrum.

Class of Levers:
The lever in fig.1 is a first-class lever. In this class of levers, the fulcrum is located between the effort (FA) and the load (CA), as shown in the diagram.

Example of First-Class Lever:
Examples of first-class levers include a seesaw, balance scale, and crowbar.

Calculation of CA using the Principle of Moments:

```
FA x AB = CA x CA
100 cm x 90 cm = CA x CA
CA = √(100 cm x 90 cm)
CA = 94.34 cm
```
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