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Bullet Fired Into A Wooden Block

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Pupil
Karma Points: 50
Respect (93%):
Date Posted: 7/24/2008 6:53:10 PM  Status: Closed
Bullet Fired Into A Wooden Block
Course Textbook Chapter Problem
General Physics College Physics (8th) by Young 8 N/A
Question Details:
A bullet of mass m_b is fired horizontally with speed v_i at a wooden block of mass m_w resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed v_f.
MLM_in_2.jpg
 
What is the speed of the block/bullet system after the collision?
Express your answer in terms of v_i, m_w, and m_b.
 
v_f  =
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Answers:

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Oracle
Karma Points: 13,032
Date Posted: 7/24/2008 6:56:55 PM  Status: Live
Asker's Rating: Lifesaver   
Response:
the momentun before the collision is:
 
 
after the collision, the momemtum becomes:
 
 
since the conservation if momemtum, we have:
 
Pi = Pf
or
 
 
=>
 
tbrider5's Comment:
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