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A man of mass $85 k g$ stands on one end of a uniform board of length $2 m$ and mass $15 k g$ . The other end is tied to the floor by a steel cable, and the board is supported from below just $0.5 m$ from the cable end (see figure).

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The tension in cable is $1000 N$

The tension in cable is $2700 N$

The normal reaction at support is $3700 N$

The normal reaction at support is $1700 N$

answer is B, C.

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Detailed Solution

$T (0.5) = 15 g \times 0.5 + + 85 g (1.5)$ …………(1)

$N = T + 100 g . . . . . . . . . . . . . (2)$

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