Question

Камень брошен горизонтально со скоростью 5 м/с. Через 0.8 с он упал на землю. С какой начальной высоты был сброшен камень?

Answer 1

h=ut/2

следовательно ответ, 2 метра 

Answer 2

Calculation of the Initial Height

To determine the initial height from which the stone was dropped, we can use the equations of motion. Since the stone was thrown horizontally, the initial vertical velocity is zero. We can use the following equation:

h = (1/2) * g * t^2

where: - h is the initial height - g is the acceleration due to gravity (approximately 9.8 m/s^2) - t is the time it takes for the stone to fall (0.8 seconds in this case)

Substituting the given values into the equation, we can solve for h:

h = (1/2) * 9.8 * (0.8)^2

Calculating this expression, we find that the initial height from which the stone was dropped is approximately 3.136 meters.

Please note that the search results did not provide a direct answer to the question. However, the calculation provided above is based on the laws of physics and the equations of motion.