An object will continue accelerating until

Options

A. The resultant force on it begins to decrease
B. The velocity changes direction
C. The resultant force on it is zero
D. the resultant force is at right angles to its direction of motion

Explanation

To solve the question "An object will continue accelerating until...", we need to analyze the relationship between force, mass, and acceleration according to Newton's laws of motion.

### Step-by-Step Solution:

1. **Understanding Acceleration**:
- According to Newton's second law of motion, the acceleration \( a \) of an object is directly proportional to the net force \( F \) acting on it and inversely proportional to its mass \( m \). This can be expressed mathematically as:
\[ F = m \cdot a \]

2. **Condition for Acceleration**:
- An object will continue to accelerate as long as there is a net force acting on it. If the net force is not zero, the object will experience acceleration.

3. **When Does Acceleration Stop?**:
- For an object to stop accelerating, the acceleration must become zero. According to the formula, if \( a = 0 \), then the net force \( F \) must also be zero because:
\[ a = \frac{F}{m} \implies F = m \cdot 0 = 0 \]

4. **Conclusion**:
- Therefore, an object will continue accelerating until the resultant (net) force acting on it becomes zero. Once the net force is zero, the acceleration will also be zero, and the object will stop accelerating.

### Final Answer:
An object will continue accelerating until the resultant force acting on it is zero.