Question

За 0,02 секунды футболист остановил летящий в его сторону мяч со скоростью 10 м / с. Масса мяча чемпионата Европы по футболу «Евро 2012» составляет 440 г. ​

Answer 1

Объяснение:

Вроде так, а если честно, то это точный ответ

Answer 2

Футболист остановил летящий в его сторону мяч со скоростью 10 м/с за 0,02 секунды. Масса мяча чемпионата Европы по футболу "Евро 2012" составляет 440 г.

Calculation:

To calculate the force exerted by the footballer to stop the ball, we can use Newton's second law of motion, which states that force (F) is equal to mass (m) multiplied by acceleration (a). In this case, the acceleration is the change in velocity divided by the time taken to stop the ball.

Given: - Initial velocity (u) = 10 m/s - Final velocity (v) = 0 m/s - Time taken (t) = 0.02 s - Mass of the ball (m) = 440 g = 0.44 kg

The acceleration (a) can be calculated using the formula: a = (v - u) / t

Substituting the given values: a = (0 - 10) / 0.02 a = -500 m/s^2

The force (F) exerted by the footballer can be calculated using the formula: F = m * a

Substituting the given values: F = 0.44 * -500 F = -220 N

Therefore, the footballer exerted a force of -220 Newtons to stop the ball.

Please note that the negative sign indicates that the force is in the opposite direction to the initial velocity of the ball.