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Two blocks are kept in contact as shown ...

Two blocks are kept in contact as shown in figure. Find ( a) forces exerted by surfaces ( floor and wall ) on blocks ( b) contact force between two blocks.

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F.B.D. of 10kg block
`N_(1) = 10g = 100N` …..(1)
`N_(2) = 100 N `

F.B.D. of 20kg block
`N_(2)= 50 `sin `30^(@) +N_(3)`
`:. N_(3) =100 -25 =75 N ` …(3)

and `N_(4)= 50 cos 30^(@) + 20g `
`N_(4) = 243.30 N `
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