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If a block of wood is placed on the edge of a table, the part of the block that hangs over the edge will eventually fall off. This is because the force of gravity is pulling down on the block, and the part that is hanging over the edge has less support than the part that is on the table. In the same way, if a block of ice is placed on the edge of a glacier, the part of the block that hangs over the edge will eventually melt. This is because the sun's heat is causing the ice to melt, and the part that is hanging over the edge has less protection from the sun than the part that is on the glacier. The same principle can be applied to any object that is placed on the edge of a surface. If the object is heavy enough, the force of gravity will eventually cause it to fall off. If the object is made of a material that is susceptible to melting, the sun's heat will eventually cause it to melt.
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