Explain the phenomena described by Bernoulli's principle and describe motion between A and B based on a velocity-time graph.

7.

• Observation: The light body will rise.
• Explanation: According to Bernoulli's principle, when the speed of the air stream above the container increases, the pressure of the air above the body decreases. The pressure of the air inside the container, below the body, remains higher. This pressure difference creates an upward force, causing the light body to rise.

8.
Between A and B, the body is accelerating with decreasing acceleration. The velocity is increasing, but the rate at which it is increasing (the slope of the graph) is becoming smaller.