Momentum: A 100-g ball falls from a window that is 12 m above ground level and experiences no significant air resistance as it falls. What is its momentum when it strikes the ground?
A. 3.3 kg ? m/s
B. 4.8 kg ? m/s
C. 1.8 kg ? m/s
D. 1.5 kg ? m/s
E. 2.4 kg ? m/s
Answer: D
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