An aircraft is moving with a velocity of `300ms^(-1)` . If all the forces acting on it are balanced, then

Options

A. It still moves with the same velocity
B. It will be just floating at the same point in space
C. It will fall down instantaneously
D. It will lose its velocity gradually

Answer

To solve the problem, we need to analyze the situation of the aircraft moving with a velocity of 300 m/s while all the forces acting on it are balanced.

### Step-by-Step Solution:

1. **Understanding Balanced Forces**:
When we say that all the forces acting on the aircraft are balanced, it means that the net force acting on the aircraft is zero. This implies that the thrust force (the forward force produced by the engines) is equal to the drag force (the resistance force acting opposite to the direction of motion), and the lift force is equal to the gravitational force acting on the aircraft.

2. **Applying Newton's First Law of Motion**:
According to Newton's First Law of Motion, an object in motion will remain in motion with the same velocity unless acted upon by a net external force. Since the forces are balanced, there is no net external force acting on the aircraft.

3. **Conclusion about Motion**:
Since the net force is zero, the aircraft will continue to move with the same velocity of 300 m/s. It will not accelerate or decelerate, and it will not change direction. The aircraft maintains its state of motion due to the balance of forces.

4. **Evaluating the Options**:
Given the options, we can conclude that the correct statement is that the aircraft will continue to move with the same velocity. The other options suggesting that it will fall, lose velocity gradually, or float at the same point are incorrect.

### Final Answer:
The aircraft will continue to move with the same velocity of 300 m/s.

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