Mass is measured in

Options

A. litres
B. Newtons
C. centimetres
D. kilograms

Answer

### Step-by-Step Solution:

1. **Understanding Mass**:
- Mass is defined as the amount of matter present in an object. It is a fundamental property of matter.

2. **Distinguishing Mass from Weight**:
- It is important to differentiate between mass and weight. Mass is a measure of matter, while weight is the force exerted by gravity on that mass.
- Weight can be calculated using the formula:
\[ \text{Weight (W)} = \text{Mass (m)} \times \text{Acceleration due to gravity (g)} \]
- On Earth, the acceleration due to gravity (g) is approximately \(9.81 \, \text{m/s}^2\).

3. **Unit of Mass**:
- The standard unit of mass in the International System of Units (SI) is the kilogram (kg).
- It is important to note that 1 kilogram is equivalent to 1000 grams (g).

4. **Conclusion**:
- Therefore, the unit of mass is primarily measured in kilograms (kg).

### Final Answer:
Mass is measured in **kilograms (kg)**.

---