Two blocks of mass 6kg (A) and 3kg (B) are connected with a string passing over a pulley as shown. The block 6kg lies on a horizontal rough surface. What can be the values of additional mass m placed on the block A so that the system does not accelerate ? (The coefficient of friction between all surface is 0.3)

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TestHub · Accepted Answer

Taking the critical case: B at rest means:

$T T ∴ f = m_{B} g = 3 \times 10 = 30 = 30 = μ N$

$30 ∴ N ∴ m = \frac{3}{10} N = 100 = 10 k g or g re a t er$

Total mass already has 6 kg.

$∴ 4 k g or m ore f or m$

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