- #1

- 37

- 0

1. Homework Statement [/b]

Bullet B weighs 0.5 oz and blocks A and C both weigh 3 lb. The coeffient of friction between the block and the plane is [tex]\mu[/tex]

mv

Imp(1 [tex]\rightarrow[/tex] 2) = int[F(t)dt]

U(1 --> 2) = T

U(1-->2) = int[F.dr]

I'm not really sure where to actually start with the problem besides starting from the second block. I tried using the impulse priniciple but that gives me an unknown time, force, and velocity and I'm not sure if the force would just be the fictional force. I also tried appying the work energy theorem but I'm not confident of that being useful here and it ended up giving me a huge velocity.

Thanks to anybody that is willing to helps me.

Bullet B weighs 0.5 oz and blocks A and C both weigh 3 lb. The coeffient of friction between the block and the plane is [tex]\mu[/tex]

_{k}= .25. Initially the bullet is moving at v_{0}and blocks A and B are at rest. After the bullet passes through A it becomes embedded in block C and all three objects come to stop in the position shown. Determine the initial speed of the bullet v_{0}.mv

_{1}+ Imp(1 [tex]\rightarrow[/tex] 2) = mv_{2}Imp(1 [tex]\rightarrow[/tex] 2) = int[F(t)dt]

U(1 --> 2) = T

_{2}- T_{1}where T is kinetic energy and U is potential energyU(1-->2) = int[F.dr]

## The Attempt at a Solution

I'm not really sure where to actually start with the problem besides starting from the second block. I tried using the impulse priniciple but that gives me an unknown time, force, and velocity and I'm not sure if the force would just be the fictional force. I also tried appying the work energy theorem but I'm not confident of that being useful here and it ended up giving me a huge velocity.

Thanks to anybody that is willing to helps me.

Last edited: