IIT JEE , AIEEE Forum - Physics , Mechanics - hc verma page 82 q 35 , i am getting 7g/13, but answer given is 8g/13

kaka01

hc verma page 82 q 35 , i am getting 7g/13, but answer given is 8g/13

rudra.panda

make sure you didn't messed the sign............ Though I don't know the question and solution :P

This happens only if signs are messed or the answer is given wrong.

nik_kaus

35) m₁ = 0.1kg

m₂ = 0.5kg

m₃ = 0.05kg.

T + 0.5a – 0.5g = 0 ...(i)

T₁ – 0.5a – 0.05g = 0 ...(ii)

T₁ + 0.1a – T + 0.05g = 0 ...(iii)

From equn (ii) T₁ = 0.05g + 0.05a ...(iv)

From equn (i) T₁ = 0.5g – 0.5a ...(v)

Equn (iii) becomes T₁ + 0.1a – T + 0.05g = 0

implies 0.05g + 0.05a + 0.1a – 0.5g + 0.5a + 0.05g = 0 [From (iv)

and (v)] implies 0.65a = 0.4g therefore a = 8g/13 downward

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