Question

The very of thood that flows in a blood vessel with radius R and length at a distance from the central axis is v/), where is the pressure difference between the end of the vessel and they (*) in the werage velocity we (with respect ton over the intervalo SSR Www Compare the serve are with the maximum velocity

Answer 1

2 weight of cable = 3 lblft (given) into smell sections of length Divide the Cable = 3x lb Also, < : Force by gravity On each section = A xfx ® 3 eb/ft Work done W = F xd . Let x be the distance from top of mene Shaft to the segment / section o work done on segment DW, = 3x.x done by on Coal x Vertical distance travelled Woal = 550 x 450 Total work done by a Riemann sem W = W, t W coal = lim 2 = lim 2. 3x0x + 550x450 & work weight of coal

work done be WCable we Let Cable will diride Cable into segments, let n be the distance from top of mine Shaft to segment & let Ax be length of segment. : work done on segment weight of segment X Vertical distance travelled = 3 Anxx 450 = 3asa W cable = (3xdx O Now, work done on Coal = weight of Coal y Vertical distance travelled 550 x 450 ( As all coal concentrated) at end of rope WCoal = 550x450 work, Wa Wcable + WCoal 450 W = 3nda +550X550 te i. Total

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