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Grade: 12
        If three blocks A , B and C   of equal weight  of  mass  2 kg .each are hanging  on  a  string  passing  over  a  fixed  pulley at  shown in given  figure. what is the  tension T in the  string connecting the  weights  of  B  and  C.
2 years ago

Answers : (1)

Arun
22985 Points
							
Let the required tension be T and the tension in the string connecting A and B be T 

equations are: 

for C = 2 g - T = 2 a            (i) 

for B = 2 g + T - T 1 = 2 a           (ii) 

and T 1 - 2 g = 2 a        (iii) 

adding (i), (ii), (iii) 

2 g = 6 a or a = g/3 

substituting in (i) = T = 2(g -a) = 2(g - g/3) = 4 g/3 

= 4(9.81)/3 = 13.08 N 
 
Regards
Arun (askIITians forum expert)
2 years ago
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