Class II levers are designed to have :

Options

A. `M.A.=V.R.`
B. `M.A.gtV.R.`
C. `M.A. gt 1`
D. `M.A. lt 1`

Answer

To solve the question regarding Class II levers, we need to understand the concept of mechanical advantage (MA) and how it applies to different classes of levers.

### Step-by-Step Solution:

1. **Understanding Levers**:
- A lever is a simple machine that consists of a rigid bar that pivots around a point called the fulcrum. There are three classes of levers based on the relative positions of the effort, load, and fulcrum.

2. **Class II Lever Definition**:
- In a Class II lever, the load is located between the effort and the fulcrum. Examples include a wheelbarrow or a nutcracker.

3. **Mechanical Advantage (MA)**:
- The mechanical advantage of a lever is defined as the ratio of the effort arm (distance from the fulcrum to the point where effort is applied) to the load arm (distance from the fulcrum to the load).
- The formula for mechanical advantage (MA) is given by:
\[ MA = \frac{d_1}{d_2} \]
where \(d_1\) is the length of the effort arm and \(d_2\) is the length of the load arm.

4. **Analyzing Class II Levers**:
- For Class II levers, the effort arm (d1) is always greater than the load arm (d2). This means:
\[ d_1 > d_2 \]

5. **Conclusion on Mechanical Advantage**:
- Since \(d_1\) is greater than \(d_2\), we can conclude that:
\[ MA > 1 \]
- This indicates that Class II levers provide a mechanical advantage greater than 1, allowing a smaller effort to lift a larger load.

6. **Final Answer**:
- Therefore, the correct statement regarding Class II levers is that their mechanical advantage is greater than 1.