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Figure 3 shows a rectangular block of wood with a hollow section (inside) at the position shown. The block is resting on a horizontal
bench.
![figgravity5520201225.JPG](/courses/uploads/figgravity5520201225.JPG)
(i) State the effect on the stability of the block when the hollow section is filled with water.
(ii) Explain your answer in (i) above.