Broken glass behaviour?

Question

I heard somewhere that when you hit glass, it mainly flies towards the direction of the blow. Is this true?

Answer 1

if you hit an object and it does not shatter then it must move away from the hit....

but since glass shatters ....the part of the glass that got hit will act normally and go away from the blow.... but the moment it breaks from the other parts around it, the tension formed between then tends to hold them together but once its broken and the glass shatters,, this tension force sends the surrounding shattered parts in the opposite direction of the piece that got hit,, therefore sending it TOWARDS THE BLOW place.

summary: the part that got hit- moves away from the blow

                  the surrounding parts that get shattered- they move towrads the blow.

Answer 2

Sure, but consider what you are asking - "If I hit an object with a blow in direction A so hard that it shatters, are the pieces of the object going to go in direction A or are they going to go flying backwards or what?"   Obviously, from physics of collisions, most of the energy of the blow is going to go into moving the material of the object before it deforms so much it breaks and that energy/momentum will keep the pieces moving.

Answer 3

I know, yeah, the MAJORITY of glass would shatter outwards the direction you struck the glass, but you have to take into account what type of glass and it's shape, ect.

Answer 4

hmmmm.