What is the SI unit of force ?

Options

A. Newton
B. Galileo
C. Einstein
D. Faraday

Explanation

To find the SI unit of force, we can follow these steps:

### Step 1: Understand the Definition of Force
Force is defined as the interaction that changes the motion of an object. It can be calculated using Newton's second law of motion, which states that force (F) is equal to mass (m) multiplied by acceleration (a).

### Step 2: Write the Formula for Force
The formula for force is given by:
\[ F = m \cdot a \]
where:
- \( F \) = force
- \( m \) = mass
- \( a \) = acceleration

### Step 3: Identify the SI Units of Mass and Acceleration
- The SI unit of mass (m) is kilograms (kg).
- The SI unit of acceleration (a) is meters per second squared (m/s²).

### Step 4: Combine the Units
To find the SI unit of force, we combine the units of mass and acceleration:
\[ \text{Unit of Force} = \text{kg} \cdot \text{m/s}^2 \]

### Step 5: Recognize the Name of the Unit
The unit kg·m/s² is defined as one Newton (N). Therefore, the SI unit of force is:
\[ \text{Newton (N)} \]

### Final Answer
The SI unit of force is Newton (N).

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