Question 1

according to bernoulli´s principle, what happens when velocity of fluid flow increases?

pressure remains the same.

pressure decreases.

pressure increases.
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question 2

how does a wing achieve lift?

by forcing air to move faster over the top of the wing

by moving air at the same rate on the top and bottom of the wing

by forcing air to move slower over the top of the wing
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question 3

what causes drag?

decrease in velocity

bernoulli´s principle

lift

friction