Question

Камень упал со скалы высотой 5 метров. Какая будет скорость камня перед падением о Землю? Сопративления воздуха не учитывайте

Answer 1

СопрОтивлениЕ
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$\frac{mv^2}{2} =mgh, v= \sqrt{2gh} = \sqrt{2*10*5} = \sqrt{100} =10$(м/с)

Answer 2

Calculation of the Speed of a Falling Stone

To calculate the speed of a stone falling from a height of 5 meters without considering air resistance, we can use the principles of free fall. In free fall, the only force acting on the stone is gravity. The acceleration due to gravity on Earth is approximately 9.8 m/s^2.

The formula to calculate the final velocity (v) of an object in free fall is:

v = √(2gh)

Where: - v is the final velocity of the stone - g is the acceleration due to gravity (9.8 m/s^2) - h is the height from which the stone falls (5 meters)

Let's substitute the values into the formula and calculate the speed:

v = √(2 * 9.8 * 5) m/s

Calculating this expression, we find that the speed of the stone just before it hits the ground is approximately 9.9 m/s.

Please note that this calculation assumes no air resistance. In reality, air resistance would have a significant impact on the speed of the falling stone. However, since you specifically mentioned not to consider air resistance, we have excluded it from the calculation.