A bullet of mass 0.010 kg and speed of 200 m/s is brought to rest in a wooden block after penetrating a distance of 0.10 m. This process takes 0.02 second. The magnitude of the impulse delivered to the bullet by the block during this time is
A. 0.98 N.
B. 2.0 Ns.
C. 1.0 Ns.
D. zero.
E. 4.0 Ns.
Answer: B
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d. 
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