Roads are banked on curves so that

Options

A. A vehicle may go with less speed
B. A vehicle may go with more speed
C. A vehicle can slip easily
D. None of these

Answer

To solve the question "Roads are banked on curves so that," we need to analyze the purpose of banking roads and the physics involved.

### Step-by-Step Solution:

1. **Understanding Banking of Roads**:
- Roads are banked on curves to help vehicles navigate turns more safely and efficiently. The banking angle allows for a better distribution of forces acting on the vehicle.

2. **Forces Acting on a Vehicle**:
- When a vehicle turns, it experiences centripetal force directed towards the center of the curve. This force is necessary to keep the vehicle moving in a circular path.
- The frictional force between the tires and the road also plays a crucial role in providing the necessary centripetal force.

3. **Role of Banking**:
- By banking the road, the normal force acting on the vehicle can be resolved into two components: one that provides the centripetal force and another that counteracts the weight of the vehicle.
- This reduces the reliance on friction alone, allowing vehicles to maintain higher speeds without slipping.

4. **Conclusion**:
- The correct reason for banking roads is to allow vehicles to navigate curves safely at higher speeds without slipping. Thus, the statement "a vehicle may go with more speed" is the most accurate choice.

### Final Answer:
- The correct option is: **A vehicle may go with more speed.**