Two forces of magnitude 3N and 4N respectively are acting on a body. Calculate the resultant force if the angle between them is
`0^(@)`

Explanation

To find the resultant force when two forces are acting on a body at an angle of 0 degrees, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Forces**:
- Let the first force \( F_1 = 3 \, \text{N} \)
- Let the second force \( F_2 = 4 \, \text{N} \)

2. **Understand the Angle**:
- The angle \( \theta \) between the two forces is given as \( 0^\circ \). This means the forces are acting in the same direction.

3. **Use the Formula for Resultant Force**:
- The formula for the resultant force \( R \) when two forces are acting at an angle \( \theta \) is given by:
\[ R = \sqrt{F_1^2 + F_2^2 + 2 F_1 F_2 \cos \theta} \]
- Since \( \theta = 0^\circ \), we know that \( \cos 0^\circ = 1 \).

4. **Substitute the Values**:
- Plugging in the values into the formula:
\[ R = \sqrt{3^2 + 4^2 + 2 \cdot 3 \cdot 4 \cdot 1} \]
- Simplifying this:
\[ R = \sqrt{9 + 16 + 24} \]
\[ R = \sqrt{49} \]

5. **Calculate the Resultant**:
- Therefore, the resultant force \( R \) is:
\[ R = 7 \, \text{N} \]

### Final Answer:
The resultant force acting on the body is \( 7 \, \text{N} \).

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