Multiple Choice
Consider two blocks hung by a massless string from a frictionless pulley as shown in the figure.The masses of the blocks are m1=5 kg and m2=7 kg.The bottoms of the blocks are 20 meters above the top of the table.What is the speed of m2 just before it strikes the table 20 meters below its starting point (within 5% accuracy) ? 
A) 22 m/s
B) 8.1 m/s
C) 20.m/s
D) 11.m/s
E) 1.7 m/s
Correct Answer:

Verified
Correct Answer:
Verified
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