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December 19, 2014

December 19, 2014

Posted by **Iamdumb** on Wednesday, October 26, 2011 at 11:09pm.

- Physics help please -
**drwls**, Wednesday, October 26, 2011 at 11:51pmUse the distance that the bullet and block travel after impact (X = 0.0500 m)to get the initial kinetic energy of bullet and block together.

(Friction force)*(distance)

= (1/2)(M+m) Vo^2

M + m = 12.0132 kg

Friction force = (0.190)(M+m) g

= 22.37 N

Solve for Vo

Once you have Vo, compute the initial momentum (M+m) Vo

That equals the initial momentum of the bullet. Divide that by bullet mass m for the bullet's velocity.

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