How Do Different Types of Forces Affect the Breaking of Glass?

  • Thread starter Mt. Nixion
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In summary, when a baseball hits a window, it causes it to break due to the transfer of kinetic energy, momentum, and pressure. This differs from using a force to deform an object, where the stiffness and strength of the object must be overcome. Glass is a brittle material that requires relatively little energy to break, even though it has a high tensile strength. This is because glass is a very brittle liquid and is also susceptible to sonic vibrations.
  • #1
Mt. Nixion
47
1
What is it that makes a window break when a baseball hits it? Is it Kinetic energy, Momentum, or Pressure?

Also, how does that relate to and differ from force? Not the force that causes a change in acceleration, but deforms an object. When an object is being twisted,
the Stiffness and Strength of an object have to be overcome.

How is using kinetic energy, momentum or pressure to break something relate to and differ from using a force to deform an object?
 
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  • #2
Kinetic energy being absorbed in the breaking of chemical bonds (electrical potential energy). Have a look at the http://www2.umist.ac.uk/material/research/intmic/features/charpy/notes.htm". Glass is brittle, and because of that it actually takes relatively little energy to break it - even though glass has such a high tensile strength, bridges are occasionally built out of it.
 
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  • #3
Glass is probably the most brittle liquid on the planet. In addition to mechanical impact of physical objects, it's also very susceptible to sonic vibrations. (Okay, that wasn't helpful to the thread, but I felt obliged to point it out.):rolleyes:
 

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