In a class two lever, the load arm is 80 cm long and the distance between the load and the effort is 120 cm. Find the MA.

Answer

To find the mechanical advantage (MA) of a class II lever, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the lengths of the arms**:
- The load arm (distance from the fulcrum to the load) is given as 80 cm.
- The distance between the load and the effort is given as 120 cm.

2. **Calculate the effort arm**:
- The effort arm is the total distance from the fulcrum to the effort. This can be calculated by adding the load arm and the distance between the load and the effort.
- Effort arm = Load arm + Distance between load and effort
- Effort arm = 80 cm + 120 cm = 200 cm

3. **Use the formula for Mechanical Advantage (MA)**:
- The formula for mechanical advantage in a lever is:
\[ MA = \frac{\text{Effort Arm}}{\text{Load Arm}} \]
- Substituting the values we have:
\[ MA = \frac{200 \text{ cm}}{80 \text{ cm}} \]

4. **Simplify the fraction**:
- Dividing both the numerator and the denominator by 80:
\[ MA = \frac{200 \div 80}{80 \div 80} = \frac{2.5}{1} = 2.5 \]

5. **Conclusion**:
- The mechanical advantage (MA) of the class II lever is 2.5.

### Final Answer:
The Mechanical Advantage (MA) is 2.5.

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