I did think about attempting the feat on video to show how difficult it would be. There is apparently a hole in the ceiling but I had been gone from the house for 1 year when the allegations were made and the incident was from months before I left. Plenty of time for evidence to be fabricated.
Keeping in mind that it has to be proven "beyond reasonable doubt", implausible should be sufficient. As I said, this is in addition to other evidence (i.e. not being in the country when the knife was broken).
Thanks for the reply. I was thinking the damping effect of the knife would be more significant than that of the sink (although given the sink is quite thin and suspended it would absorb much more energy than other steel structures - the energy released as sound is an indicator of this).
This is going to sound odd but I am hoping to use physics to defend an allegation made by my ex-wife. She alleges that I threw a knife into my kitchen sink and it bounced up and stuck into the ceiling (in reality I was overseas when the knife was broken by her brother - I'm just hoping to use as...