The answer for this question is not 384 m/s, so please doe not give that as your

Question

The answer for this question is not 384 m/s, so please doe not give that as your answer and please show your work. I have check that and it is wrong.

A 16.0 g bullet is shot into a wooden blick at rest with mass 4420 g on a friction-less surface. The block moves at 1.40 m/s after the bullet hits it and becomes lodged in it. What was the velocity of the bullet before hitting the block?

1000. s

437 m/s

519 m/s

401 m/s

The answer for this question is not 384 m/s, so please doe not give that as your answer and please show your work. I have check that and it is wrong.

1000. s

Explanation / Answer

from the law of conservation of linear momentum;

m1v1=(m+M)vf

0.016*v1=(0.016+4.42)*1.4

v1=6.2104/0.016

     =388.15m/s

that is the correct answer according to the law of conservation of linear momentum.

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