A bullet moving with a speed of 200 m/s penetrates a wooden block. It travels a distance of 50 cm in the wooden block. What is the retardation offered by the wooden block?
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1
Explanation:
Correct option is
C
244.9cm/s
v
2
−u
2
=2as
0−(200)
2
=2a×4
⇒a=5000cm/s
2
Now initial velocity to travel 6 cm,
0−u
2
=−2×5000×6
⇒u=244.9cm/s
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