Find Initial Velocity of 5.5g Bullet Impacting 22.6g Block

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SUMMARY

The discussion focuses on calculating the initial velocity of a 5.5g bullet impacting a 22.6g block of wood. The block is positioned on a 1.5m tall post, and after the collision, the bullet and block land 2.5m from the base. The problem is approached through the principles of projectile motion and momentum conservation, allowing for the determination of the bullet's initial speed by first calculating the final momentum of the combined system and then using it to find the initial momentum.

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A 5.5g bullet is fired into a block of wood with a mass of 22.6g. The wood block is initially at rest on a 1.5m tall post. After the collision, the wood block and bullet land 2.5m from the base of the post. Find the initial speed of the bullet. I just need a little help on where to start. I'm confused because no velocities are given.
 
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Thats is what u have to calculate
 
Try the reverse problem assuming the velocities.

Divide the Problem into STEPS.

1)First it is a projectile motion from the given information u can calculate the velocity(Bullet +wood system)

2) now u have the final momentum(combined system) of collision so u can calculate the initial momentum
 

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