Momentum: A firecracker breaks up into two pieces, one of which has a mass of 200 g and flies off along the +x-axis with a speed of 82.0 m/s. The second piece has a mass of 300 g and flies off along the +y-axis with a speed of 45.0 m/s. What is the total momentum of the two pieces?
A. 361 kg ? m/s at 56.3° from the +x-axis
B. 93.5 kg ? m/s at 28.8° from the +x-axis
C. 21.2 kg ? m/s at 39.5° from the +x-axis
D. 361 kg ? m/s at 0.983° from the +x-axis
E. 21.2 kg ? m/s at 56.3° from the +x-axis
Answer: C
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Exhibit 7-1
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?
?
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