A wind of 7 meters per second is a category 4 wind.
Wind level 4 is a wind on the Beaufort scale with a wind speed of 5.5-7.9m/s, 20-28km/h, also known as gentle wind, with a wind pressure of 18.9-39Pa, which can blow There are dust and paper on the ground, and the twigs of the trees move slightly. Generally speaking, the wind is relatively light. When the fishing boat is full, he leans to one side and fishes. the wind is good. The small waves on the sea are getting higher and higher, and the wave crests are getting more and more foamy. Dust and sand fly across the earth, and pieces of paper fly, small tree trunks. trembling.
The Beaufort scale is an internationally accepted wind scale. It was formulated by the Englishman Francis Beaufort in 1805 to express the level of wind intensity. The wind scale iscalled wind expression method. intensity (wind force), which is why it is also called the “Beaufort wind scale.” It was originally divided into levels from 0 to 12 based on the impact of wind on objects on the ground or sea surface, with a total of 13 levels.
Classification of wind force
The size of wind speed is often expressed by several wind levels. The wind level is determined depending on the degree of influence. wind on objects on the ground. Meteorologically, winds are generally divided into twelve levels according to their strength:
Level 0 wind is also called calm wind.
Level 2 winds are called light breezes. There is a slight rustle on the leaves and people feel the wind on their faces.
Level 4 winds are called gentle breezes. Swaying tree branches can blow dust and paper onto the ground.
The nWind level 6 is called strong wind, large branches sway, power lines whir, and it is difficult to walk with an umbrella.
A level 8 wind is called strong wind, and tree twigs can be broken, making it very difficult to walk against the wind.
Level 10 winds are called strong winds. Land is scarce and can uproot trees and cause serious damage to buildings.
Winds above level 12 are called typhoons or hurricanes, which are extremely destructive and rarely seen on land.
Which level is equivalent to a wind speed of 7 meters per second?
There are thirteen levels of wind energy. Level 0 refers to a wind speed of 0 to. 0.2 meters per second The characteristics are: Calm wind, smoke rising upwards. Level 1 refers to a wind speed of 0.3 to 1.5 meters per second, characterized by gentle wind,and the smoke can indicate the direction. Level 2 refers to a wind speed of 1.6 to 3.3 meters per second, characterized by light wind and a slight sound of tree branches. Level 3 refers to a wind speed of 3.4 to 5.4 meters per second, characterized by light winds and flags displayed. Level 4 refers to a wind speed of 5.5 to 7.9 meters per second, characterized by gentle winds, and ground dust and paper can be blown away by the wind. Level 5 refers to a wind speed of 8 to 10.7 meters per second. It is characterized by cool, strong winds, small shaking trees and small waves on the water surface. Level 6 refers to a wind speed of 10.8 to 13.8 meters per second. It is characterized by strong winds, large branches shaking and power lines whirring. Level 7 refers to a wind speed of 13.9 to 17.1 meters per secwave. It is characterized by strong winds, shaking of the entire tree, and difficulty walking against the wind. Level 8 refers to a wind speed of 17.2 to 20.7 meters per second. It is characterized by strong winds, broken branches and great resistance to walking forward. Level 9 refers to wind speeds of 20.8 to 24.4 meters per second. It is characterized by strong winds that can blow over small roofs and make navigation difficult for steamboats. Level 10 refers to wind speeds of 24.5 to 28.4 meters per second. It is characterized by strong winds, rare on earth, which can cause buildings to fall. Level 11 refers to wind speeds of 28.5 to 32.6 meters per second. It is characterized by storm winds and is very destructive. It is extremely dangerous for steamships to encounter it. Level 12 means the wind speed isgreater than 32.6 meters per second, characterized by hurricanes, monstrous waves and extremely destructive power.
Hello, a wind speed of 7 meters per second is equivalent to a level 4 breeze. See the figure below for more details:
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Wind force refers to the force exerted by wind blowing on an object. Generally, the wind force is divided into 18 levels according to the different phenomena caused by the wind blowing on objects on the ground or on the water surface, the minimum being level 0 and the maximum being level 17.