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On smooth horizontal surface a block A o...

On smooth horizontal surface a block A of mass 10 kg is kept . On this block a second block B of mass 5 kg is kept .The coefficient of friction between the two blocks is `0.4` .A horizontal force of 30 N is applied on the lower block as shown . The force of friction between the blocks is (take `g = 10 m//s^(2)`)

Text Solution

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Here `m_(A) = 10 kg , m_(B) = 5 kg `
`F = 30 N , mu = 0.4`
`F = (m_(A)+m_(B))a`
`rArr a = F/((m_(A)+m_(B)))`
` = 30/(10+5) = 2ms^(-2)`
` f = m_(B)a = 5 xx 2 = 10 N `
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