Dyne-sec stands for the unit of :

Options

A. Momentum
B. force
C. work
D. angular momentum

Explanation

To solve the question "Dyne-sec stands for the unit of:", we will analyze the components of the unit "dyne-sec" step by step.

### Step-by-Step Solution:

1. **Identify the Components of the Unit**:
- The unit "dyne-sec" consists of two parts: "dyne" and "sec".
- "Dyne" is a unit of force in the CGS (centimeter-gram-second) system.
- "Sec" (second) is a unit of time.

2. **Understand the Relationship**:
- In physics, we often relate force, time, and momentum.
- Momentum (p) is defined as the product of mass (m) and velocity (v), and it can also be expressed in terms of force (F) and time (t) as:
\[ p = F \times t \]
- Thus, if we multiply a force (in dynes) by a time (in seconds), we obtain momentum.

3. **Calculate the Unit**:
- Since "dyne" is a unit of force and "sec" is a unit of time, the unit "dyne-sec" represents:
\[ \text{dyne-sec} = \text{force} \times \text{time} = \text{momentum} \]

4. **Conclusion**:
- Therefore, the unit "dyne-sec" stands for the unit of momentum.

### Final Answer:
The correct option is **momentum**.

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