P2. AArca AFluid density pPI, AConsider a vertical cylindrical element of fluid with cross sectional area (A) and mass density (p). Showthat in a fluid under gravity, pressure decreases linearly with increase in height.State the law of momentum conservation. Two bodies A and B each of mass 500 g move inthe same direction with speeds of 10 m/s and 20m/s respectively. State one condition thatought to be satisfied to ensure a collision between A and B.A fluid of density 960kg/m³ is flowing steadily through a horizontal tube of sections 1 and 2.The section diameters are d1=100mm and d2=80mm. the gauge pressure and fluid velocity atsection 1 is 20O0KN/m2 and 5m/s respectively. What is the gauge pressure at section 2?

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P2. Area A Fluid demsity p PI, A Consider a vertical cylindrical element of fluid with cross sectional area (A) and mass density (p). Show that in a fluid under gravity, pressure decreases linearly with increase in height.