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April 23, 2014

Homework Help: physics

Posted by Jim on Tuesday, April 3, 2012 at 9:38pm.

If you drop a piece of ice on a hard surface, the energy of impact will melt some of the ice. The higher it drops, the more ice will melt upon impact.Find the height from which a block of ice should ideally be dropped to completely melt it that falls without air drag.
[Hint: Equate the joules of gravitational potential energy to the product of the mass of ice and its heat of fusion (in SI units, 335,000 J/kgDo you see why the answer doesn't depend on mass?]

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