Two blocks of masses m each are hung from a balance as shown in the figure. The scale pan A is at height H 1 whereas scale pan B is at height H 2 . Net torque of weights acting on the system about point 'C', will be (length of the rod is λ and H 1 & H 2 are << R) (H 1 > H 2 )
A
mg 
λ
λ
B
λ
C
λ
D
2mg 
λ
λ
Text Solution
Verified by ExpertsThe correct answer is:
B
Net torque = F 2 . 
– F 1 . 
= (F 2 – F 1 ) 
F 2 = mg H2 = mg 
F 1 = mg H1 = mg 
τ = (F 2 – F 1 ) 
= 
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