In a class three lever, the distance between the effort and the load is 40 cm and load arm is 1 m long. Find the length of the effort arm and then calculate MA.

Answer

To solve the problem step by step, we will find the length of the effort arm and then calculate the mechanical advantage (MA).

### Step 1: Understand the given information
We have the following information:
- Distance between the effort and the load (effort arm) = 40 cm
- Load arm = 1 m = 100 cm

### Step 2: Calculate the length of the effort arm
In a class 3 lever, the effort arm can be calculated by subtracting the distance between the effort and the load from the load arm.

Effort arm = Load arm - Distance between effort and load
Effort arm = 100 cm - 40 cm
Effort arm = 60 cm

### Step 3: Calculate the Mechanical Advantage (MA)
The mechanical advantage is calculated using the formula:
\[ \text{MA} = \frac{\text{Effort arm}}{\text{Load arm}} \]

Substituting the values we found:
\[ \text{MA} = \frac{60 \text{ cm}}{100 \text{ cm}} \]
\[ \text{MA} = \frac{60}{100} = \frac{3}{5} = 1.5 \]

### Final Answers
- Length of the effort arm = 60 cm
- Mechanical Advantage (MA) = 1.5

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