Question

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Water Tank and block (3 P) Water flows from a large tank through an orifice of 4 cm diameter and against a block. Water H tank The block weighs 10 kg, and the coefficient of friction between block and floor is 0.57 Block G-10kg What is the minimum height to which the water must rise in the tank in order to start the7 block moving to the right?

Answer 1

To move block, force must be at least mu N = mu mg Normal force Pressure at orifice = delta g (H - 5) Force = Press times Area of orifice = > Force = delta g (H - 5) pi (2)^2 = 0.57 times 10 g = > 10^-3 (H - 5) 4 pi = 5.7 = > H - 5 = 453.6 cm = > H = 458.6 cm {delta = 19/cm^3 = 10^-3 kg/cm^3}