A bullet weighing 0.05 kg penetrates into a blockof wood of mass 2 kg with a velocity of 150m/sand gets embedded the block of wood is theblock of wood was intially at rest calculate bthe work done
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Explanation:
Answer:
Δp=1.4•10^-4 kg•m/s.
Explanation:
If the block doesn’t move with bullet inside, the magnitude of acceleration (deceleration) of the bullet is
a =v²/2s=350²/2•0.15=408333 m/s².
F=ma= 0.05•408333= 20417 N.
The change in momentum of the bullet
Δp=p2-p1=0-m•v=-0.05•350=-1.4•10^-4 kg•m/s.
The impulse exerted by the wood on the bullet = Δp=1.4•10^-4 kg•m/s.
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