Question

1) Из приведенных примеров демонстрирует реактивное движение. 1. полет бабочки 2. падение камня с башни 3. движение медузы в океане 4. движение мотоцикла 2) Мотоцикл массой 200 кг, двигаясь прямолинейно, увеличил скорость от 3 м/c до 5 м /c. Найдите изменение импульса мотоцикла.

Answer 1

1)3 медуза втягивает в себя количество воды и мощной струей выталкивает ее из себя

Answer 2

Examples of Reactive Motion

Reactive motion refers to the movement or behavior of an object in response to external stimuli. Among the examples provided, the one that demonstrates reactive motion is the movement of a jellyfish in the ocean. Jellyfish are known for their ability to move by contracting and relaxing their bell-shaped bodies, allowing them to propel themselves through the water. This movement is reactive to the surrounding water currents and helps the jellyfish navigate and capture prey.

Calculation of Change in Momentum

To calculate the change in momentum of a motorcycle, we need to know the mass of the motorcycle and the change in its velocity. In this case, the motorcycle has a mass of 200 kg and its velocity increases from 3 m/s to 5 m/s.

The change in momentum of an object can be calculated using the formula:

Change in Momentum = Final Momentum - Initial Momentum

The momentum of an object is given by the product of its mass and velocity:

Momentum = Mass x Velocity

Let's calculate the change in momentum of the motorcycle:

Initial Momentum = Mass x Initial Velocity = 200 kg x 3 m/s = 600 kg·m/s

Final Momentum = Mass x Final Velocity = 200 kg x 5 m/s = 1000 kg·m/s

Change in Momentum = Final Momentum - Initial Momentum = 1000 kg·m/s - 600 kg·m/s = 400 kg·m/s

Therefore, the change in momentum of the motorcycle is 400 kg·m/s.

Please note that the sources provided do not contain relevant information for this specific calculation.