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  4. Two blocks A and B are arranged as shown in the figure. The pulley is frictionless. The mass of A is 10 kg. The coefficient of friction of A with the horizontal surface is 0.20. To stan the motion the minimum mass of B is

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Q. Two blocks A and B are arranged as shown in the figure. The pulley is frictionless. The mass of A is 10 kg. The coefficient of friction of A with the horizontal surface is 0.20. To stan the motion the minimum mass of B isPhysics Question Image

BVP MedicalBVP Medical 2011

Solution:

Mass of block $ \mu F $ Coefficient of friction $ \mu F $ Force of friction $ \mu F $ where R is reaction of plane. ie, $ \mu F $ $ \mu F $ $ [M{{L}^{-1}}{{T}^{-2}}] $ To start motion force due to B must be equal to F. ie, $ [ML{{T}^{-1}}] $ $ [ML{{T}^{-2}}] $ $ [M{{L}^{2}}{{T}^{-2}}] $ $ \frac{3aT}{2} $