Question

В среднем, кинетическая энергия пущенной из лука стрелы состовляет 325 Дж, а скорость до 100м/c. Определите среднюю массу лучной стрелы.

Answer 1

Ответ:65г

просто подставляем под формулу кинетической энергии

Answer 2

Calculation of the Average Mass of the Arrow

To determine the average mass of the arrow, we can use the formula for kinetic energy:

Kinetic Energy (KE) = (1/2) * mass * velocity^2

Given that the kinetic energy of the arrow is 325 J and the velocity is 100 m/s, we can rearrange the formula to solve for mass:

mass = (2 * KE) / velocity^2

Substituting the given values, we get:

mass = (2 * 325 J) / (100 m/s)^2

Calculating this expression, we find:

mass ≈ 0.65 kg

Therefore, the average mass of the arrow is approximately 0.65 kg.

Please note that the above calculation assumes that the arrow is a point mass and neglects factors such as air resistance and the rotational motion of the arrow.