Energy Conservation With Conservative Forces: A bead is moving with a speed of 20 m/s at position A on the track shown in the figure. This track is friction-free, and there is no appreciable air resistance. What is the speed of the bead at point C?
A. 0 m/s
B. 34 m/s
C. 69 m/s
D. 20 m/s
E. We cannot solve this problem without knowing the mass of the bead.
Answer: B
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