A horizontal board of length 6.1 m and mass 12.8 kg rests on two supports. The first support is at one end of the board. The second support is at a distance of 2.38 m from the other end of the board. What force does this second support exert on the board

102.84 N

Explanation:

Given

Mass of board

Length of board

First support is at one end and second support is at a distance of 2.38 m from the other end

Suppose and are the reactions at the two support

Taking moment about the first end we can write

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