A block B is pulled by a force of 18 N a...

A block B is pulled by a force of 18 N applied to a light pulley as shown in the figure. If the coefficient of friction is 0.4 and the acceleration of the block is 0.5 `ms^(-2)` , the mass of the block is `(g = 10 m//s^2)`

1kg

2 kg

3 kg

1.5 kg

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