Thursday
June 20, 2013

# Homework Help: physics

Posted by riana on Sunday, May 20, 2012 at 2:05pm.

a bullet initially moving with a velocity 20m/s strikes a target and comes to rest after penetrating a distance 10cm in the target calculate the retardation/deceleration caused by the target.

• physics - bobpursley, Sunday, May 20, 2012 at 2:05pm

solve for a.

• physics - raffin, Sunday, May 20, 2012 at 2:08pm

can u do it fully

• physics - Elena, Sunday, May 20, 2012 at 6:51pm

0 = v –a•t, t = v/a,
s = v•t - at²/2 = v²/a – (a/2)• (v/a)² = v²/2•a.
a = v²/2•s = 20²/2•0.1 =2000 m/s²

• I don't know - Romeo, Saturday, June 16, 2012 at 11:24am

F*** yuh !!!

• physics - Romeo, Saturday, June 16, 2012 at 11:33am

Who the hell are you riana ?

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