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Q. No.A wind with a speed of \(40~\text{m/s}\) blows parallel to the roof of a house. The area of the roof is \(250~\text{m}^2.\) Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the force will be:
\((\rho_{\text {air }}=1.2~\text{kg/m}^3)\)
\((\rho_{\text {air }}=1.2~\text{kg/m}^3)\)
| 1. | \(4 \times 10^5~\text N,\) downwards | 2. | \(4 \times 10^5~\text N,\) upwards |
| 3. | \(2.4 \times 10^5~\text N,\) upwards | 4. | \(2.4 \times 10^5~\text N,\) downwards |
Subtopic: Â Bernoulli's Theorem |
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Level 2: 60%+
NEET - 2015
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