Assertion (A): The upper surface of the wing | vedclass

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(C) The shape of an aeroplane wing is designed such that the upper surface is convex and the lower surface is relatively flat or concave. According to

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$A$ is true,$R$ is false

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(C) The shape of an aeroplane wing is designed such that the upper surface is convex and the lower surface is relatively flat or concave. According to Bernoulli's principle, the air flowing over the curved upper surface travels at a higher velocity compared to the air flowing beneath the wing. As velocity increases, pressure decreases $(P + \frac{1}{2} ho v^2 = 	ext{constant})$. Therefore, the pressure at the top is lower than the pressure at the bottom, creating an upward force known as lift. The assertion $(A)$ is true, but the reason $(R)$ is false because the air at the top has higher velocity, not smaller, and the pressure at the top is lower, not higher.

Assertion $(A)$: The upper surface of the wing of an aeroplane is made convex and the lower surface is made concave.
Reason $(R)$: The air currents at the top have smaller velocity and thus less pressure at the bottom than at the top.

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Assertion $(A)$: The upper surface of the wing of an aeroplane is made convex and the lower surface is made concave.Reason $(R)$: The air currents at the top have smaller velocity and thus less pressure at the bottom than at the top.