Two constant forces 4 N and 5 N act on a body in opposite directions. Find the resultant force on the body.

Explanation

To find the resultant force acting on a body when two constant forces are applied in opposite directions, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Forces**:
- We have two forces acting on the body:
- Force \( F_1 = 4 \, \text{N} \) (acting in one direction)
- Force \( F_2 = 5 \, \text{N} \) (acting in the opposite direction)
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