Humanities/Arts Exam > Humanities/Arts Videos > Geography Class 11 > Forces Affecting the Velocity and Direction of Wind
Forces Affecting the Velocity and Direction of Wind Video Lecture | Geography Class 11 - Humanities/Arts
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FAQs on Forces Affecting the Velocity and Direction of Wind Video Lecture - Geography Class 11 - Humanities/Arts
| 1. What are the main forces that affect the velocity and direction of wind? |  |
Ans. The main forces that affect the velocity and direction of wind are pressure gradient force, Coriolis force, and frictional force. The pressure gradient force is responsible for the movement of air from areas of high pressure to areas of low pressure. The Coriolis force, caused by the Earth's rotation, deflects the wind to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. Frictional force, which is influenced by the roughness of the Earth's surface, slows down the wind near the ground.
| 2. How does the pressure gradient force affect the velocity and direction of wind? | |
Ans. The pressure gradient force is responsible for the movement of air from areas of high pressure to areas of low pressure. The greater the difference in pressure, the stronger the force and the faster the wind will blow. The direction of the wind is influenced by the orientation of the pressure gradients. Air flows perpendicular to the isobars, from high pressure to low pressure.
| 3. What is the Coriolis force and how does it affect the velocity and direction of wind? | |
Ans. The Coriolis force is caused by the rotation of the Earth and it deflects moving objects, including air, to the right in the Northern Hemisphere and to the left in the Southern Hemisphere. In the context of wind, the Coriolis force influences the direction of the wind, causing it to curve rather than moving in a straight line. The effect of the Coriolis force increases with the speed of the wind and is maximum at the poles.
| 4. How does frictional force affect the velocity and direction of wind? | |
Ans. Frictional force is influenced by the roughness of the Earth's surface. Near the ground, friction slows down the wind and causes it to change direction. This is known as the boundary layer flow. The magnitude of the frictional force depends on the roughness of the surface. Smooth surfaces, such as water, experience less friction and allow the wind to flow faster and in a more consistent direction compared to rough surfaces like land.
| 5. Are there any other factors that can affect the velocity and direction of wind apart from the main forces mentioned? | |
Ans. Yes, apart from the main forces, other factors such as temperature gradients, topography, and local atmospheric conditions can also affect the velocity and direction of wind. Temperature gradients can create pressure differences and influence wind patterns. Topography, such as mountains and valleys, can cause the wind to be deflected or channeled. Local atmospheric conditions like thunderstorms or sea breezes can also temporarily impact wind patterns in a specific area.
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Nov 17, 2024 Last updated |
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