# A balanced lever has two weights on it, the first with mass #16 kg # and the second with mass #21 kg#. If the first weight is # 3 m# from the fulcrum, how far is the second weight from the fulcrum?

##### 1 Answer

Use the guide below. Plug in given values and calculate.

#### Explanation:

A body which has no tendency to **rotate** under the combined result of a number of forces acting on it is called to be in a **balanced state**.

The rotational tendency of a force is called **Moment** of the force.

**Moment**

where **Moment arm**, which is perpendicular distance between the line of action of the force and the **center of moments**.

Also in a balanced lever **clockwise moments are equal to clockwise moments**.

In the given question, forces acting are two weights for which

If *i.e* ., perpendicular distance between the weight and the fulcrum, then moment of one force about the fulcrum is equal and opposite to the moment of other force about the fulcrum.

Stating mathematically

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