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Q & A: An 8.09 g bullet is fired horizontally ....

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Most recent answer: 01/13/2010
Q:
An 8.09 g bullet is fired horizontally into a 9.23 kg block of wood on an air table and is embedded in it. After the collision, the block and bullet slide along the frictionless surface together with a speed of 10.8 cm/s. What was the initial speed of the bullet?__
- Doe (age 37)
Denver Co US
A:

We don't do homework problems here but we do offer advice.  Your question involves conservation of momentum.  In this case the initial momentum is just that of the bullet.  The final momentum is that of the total mass times the final joint velocity.  Go figure.

LeeH


(published on 01/13/2010)

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