A body is acted upon by a constant force, then it will have a uniform

Options

A. speed
B. velocity
C. momentum
D. acceleration

Explanation

To solve the question "A body is acted upon by a constant force, then it will have a uniform...", we need to analyze the effects of a constant force on a body. Let's break it down step by step.

### Step-by-Step Solution:

1. **Understanding Force and Acceleration**:
- According to Newton's second law of motion, when a constant force \( F \) is applied to a body of mass \( m \), it produces an acceleration \( a \) given by the formula:
\[ F = m \cdot a \]
- If the force is constant and the mass of the body is also constant, then the acceleration \( a \) will also be constant.

**Hint**: Remember that constant force leads to constant acceleration.

2. **Effect on Velocity**:
- The velocity of the body is affected by the acceleration. If the body starts with an initial velocity \( u \) and experiences constant acceleration \( a \), the velocity \( v \) at any time \( t \) can be calculated using the equation:
\[ v = u + a \cdot t \]
- Since the acceleration is constant, the velocity will change over time. Therefore, the body does not have uniform velocity.

**Hint**: Constant acceleration means velocity changes over time.

3. **Effect on Speed**:
- Speed is the magnitude of velocity. Since velocity is changing due to constant acceleration, the speed of the body will also change. Hence, the body does not have uniform speed.

**Hint**: If velocity is not uniform, speed cannot be uniform either.

4. **Effect on Momentum**:
- Momentum \( p \) is defined as the product of mass and velocity:
\[ p = m \cdot v \]
- Since the velocity is changing due to constant acceleration, the momentum will also change. Therefore, the body does not have uniform momentum.

**Hint**: Changing velocity leads to changing momentum.

5. **Conclusion**:
- From the analysis, we conclude that when a body is acted upon by a constant force, it will have:
- Constant acceleration (due to constant force)
- Non-uniform speed (because speed changes with time)
- Non-uniform velocity (as velocity changes with time)
- Non-uniform momentum (as momentum changes with velocity)

Thus, the final answer is that the body will have **uniform acceleration** but not uniform speed, velocity, or momentum.

### Final Answer:
- The body will have **uniform acceleration**.