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Grade: 12th pass

                        

Three blocks A, B and C each of mass 4 kg are attached as shown in figure. Both the wires has equal cross sectional area 5 x 10-7 m2. The surface is smooth. Find the longitudinal strain in each wire if Young modulus of both the wires is 2 x 101 N/m2 (take g 10 m/s2)

one year ago

Answers : (1)

Vikas TU
13783 Points
							
Acceleraton of system of masses = 4g/12 = g/3 
ension in wire 1 = 4g / 3
strain = {(4g/3)/5*10^(-7)}/2*10^11 = 1.33 * 10^(-4)
tension in wire 2 = 8g/3 
strain = 2.6*10^(-4)
one year ago
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