A brick is thrown vertically from an aircraft flying two kilometres above the earth. The brick will fall with a

When an object like a brick is thrown from an aircraft, it undergoes vertical motion under the primary influence of Earth's gravitational force. Near the surface of the Earth, all objects fall with a constant acceleration, denoted as 'g', which is approximately 9.8 m/s² [2]. This acceleration due to gravity is considered constant at any given location, meaning the rate at which the velocity increases remains uniform throughout the fall [2]. While real-world conditions involve air resistance which can eventually lead to terminal velocity, standard physics problems of this nature—especially those involving heavy, dense objects like bricks—typically assume a uniform gravitational field where acceleration remains constant [2]. Therefore, as the brick falls toward the Earth, its speed increases at a steady rate, characterized by constant acceleration.

Sources

1. [2] https://www1.grc.nasa.gov/beginners-guide-to-aeronautics/motion-of-free-falling-object/