Q. Which of the following forces affect the velocity and direction of wind?
1.Pressure Gradient Force
2.Frictional Force
3.Coriolis Force
Choose the correct answer from below given codes:<.strong>
Answer: D
Notes:
Explanation: The air in motion is called wind. The wind blows from high pressure to low pressure. The wind at the surface experiences friction.
- In addition, rotation of the earth also affects the wind movement. The force exerted by the rotation of the earth is known as the Coriolis force.
- Thus, the horizontal winds near the earth surface respond to the combined effect of three forces – the pressure gradient force, the frictional force and the Coriolis force.
- In addition, the gravitational force acts downward.
Source: NCERT – Fundamental of Physical Geography
