Posted by stoicrider77 on Friday, November 2, 2012 at 10:09am.
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 10g nail when it is struck by a 550g hammer moving with an initial speed of 3.8 m/s.

physics  bobpursley, Friday, November 2, 2012 at 10:14am
I disagree with your premise, if that were true, nails would not get hot when struck.
Momentum conservation:
550*3.8=550Vh' + 10Vn'
Vh'=3.81/55 3.8Vn'
energy conservation
1/2 550*3.8^2=1/2 550 Vh'^2 + 1/2 10 Vn^2
put the Vh' expression found into this equation, do the math, solve for Vn'.
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