2. The discharge over a rectangular weir, considering the velocity of approach, is (where H1 = Total height of water above the weir = H + HaH = Height of water, over the crest of the weir, and Ha = Height of water, due to velocity of approach)
8. Whenever a plate is held immersed at some angle with the direction of flow of the liquid, it is subjected to some pressure. The component of this pressure, at right angles to the direction of flow of the liquid is known as lift.