The gravitational force which acts on 1 kg is

Options

A. 9.8 N
B. `(1)/(9.8)N`
C. 980 N
D. `(1)/(980)N`

Answer

To solve the problem of finding the gravitational force acting on a mass of 1 kg, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Gravitational Force**:
The gravitational force acting on an object can be calculated using the formula:
\[ F = m \cdot g \]
where:
- \( F \) is the gravitational force,
- \( m \) is the mass of the object,
- \( g \) is the acceleration due to gravity.

2. **Identify the Given Values**:
- The mass \( m \) is given as \( 1 \, \text{kg} \).
- The acceleration due to gravity \( g \) at the surface of the Earth is approximately \( 9.8 \, \text{m/s}^2 \).

3. **Substitute the Values into the Formula**:
Now, substitute the known values into the formula:
\[ F = 1 \, \text{kg} \cdot 9.8 \, \text{m/s}^2 \]

4. **Calculate the Gravitational Force**:
Performing the multiplication:
\[ F = 9.8 \, \text{kg} \cdot \text{m/s}^2 \]
Since \( 1 \, \text{kg} \cdot \text{m/s}^2 \) is equivalent to \( 1 \, \text{N} \) (Newton), we can write:
\[ F = 9.8 \, \text{N} \]

5. **Conclusion**:
Therefore, the gravitational force acting on a mass of \( 1 \, \text{kg} \) is \( 9.8 \, \text{N} \).

### Final Answer:
The gravitational force which acts on 1 kg is **9.8 N**.