In this scenario, both coins are released at the same time, with one coin (coin A) being dropped vertically and the other coin (coin B) being thrown horizontally from the same height. Assuming no external forces or air resistance, both coins would reach the ground at the same time.
The horizontal motion of coin B does not affect its vertical motion. While coin B is moving horizontally, its vertical motion is solely determined by the force of gravity acting on it, causing it to accelerate downward at a constant rate. Coin A, being dropped vertically, also experiences the same acceleration due to gravity.
Since both coins experience the same acceleration due to gravity, they fall at the same rate vertically. The horizontal motion of coin B does not affect this vertical acceleration. Therefore, both coins would reach the ground simultaneously.
This phenomenon can be explained by the principle of independence of motion. In the absence of external forces, the horizontal and vertical motions of an object are independent of each other. Thus, the motion of coin B being thrown horizontally has no impact on the time it takes for it to fall vertically and reach the ground.