A gun fires a 21-gram bullet on a 1.8 kg wooden block hanging
vertically at the end of string (The other end of the string is
attached to a ceiling). The bullet embeds in the block, which
swings upward a height of H. The speed of the bullet when leaving
the gun is 250 m/s.
A gun fires a 21-gram bullet on a 1.8 kg wooden block hanging vertically at the end of string (The other end of the stri
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