Question

Поплавок привязан нитью к дну сосуда, наполненного водой, причем поплавок полностью погружен в воду, а нить вертикальна. Сосуд находится в движущемся вагоне поезда. Поезд начинает тормозить. Что произойдет с поплавком?a) поплавок отклонится вперед (по движению)б) поплавок отклонится назад ( против движения)в) поплавок не отклонится (нить останется веритикально)

Answer 1

Поплавок наклонится вперед

Answer 2

The Effect of Braking on the Buoy

When a buoy is attached to the bottom of a vessel filled with water and the buoy is fully submerged while the string is vertical, and the vessel is in a moving train that starts to brake, what will happen to the buoy?

The buoy will not deviate from its vertical position. The string will remain vertical.

Explanation

When the train starts to brake, the vessel and everything inside it, including the water and the buoy, will experience a deceleration force. However, since the buoy is fully submerged in the water and the string is vertical, the buoy will not be affected by the deceleration force. The buoy will remain in its original position, and the string will continue to be vertical.

This is because the buoyancy force acting on the buoy is equal to the weight of the water displaced by the buoy. The buoyancy force is determined by the volume of the buoy that is submerged in the water and the density of the water. Since the buoy is fully submerged, the buoyancy force will remain constant regardless of the deceleration force acting on the vessel.

Therefore, the buoy will not deviate in any direction, and the string will remain vertical.