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Under the action of constant force, a 2kg block moves such that its position x as a function of time is given by X=t^3/3 ,where x in meters and t in sec , the workdone by force in first 2 seconds isA 26.6 jB 3.3 jC 16 jD 32 jSolution) v=dx/dt=t^2,a=dv/dt=2t,f(t)=ma(t),w=∫f(t)*v(t) dt (from x=0 to x=2 sec)
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A load of 2MN is applied on a short concrete column 500 mm x 500 mm. The column is reinforced with four steel bars of 10 mm diameter, one in each corner. Evaluate the stresses in t
An open belt connects two flat pulleys. The pulley diameters are 300 mm and 450 mm and the corresponding angles of Cap are 160 o and 210 o . The smaller pulley runs at 200 r.p.
National supply and national demand curves: 1. Explain why neighboring countries tend to trade extensively with each other. 2. Use Table 1.1 to find the five most open econ
At a point in a rectangular block of elastic material under strain, there is a tensile stress of 50MPa on one plane and a compressive stress of 30 MPa on a plane at right angles. T
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Draw BCC structure and determine its number of atoms per unit cell, co-ordination number and highest edgeradius relation. Draw FCC structure and determine its number of atoms pe
write the assumption made in derivetion of shear stress produced in circular shaft subjected to torsion
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Determine the stresses in the shell: A cylindrical boiler is 2.5 m in diameter and 20 mm in thickness and it carries steam at a pressure of 1.0 N/mm2. Determine the stresses i
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