A Bead Is Moving with a Speed of 20 M/s

Multiple Choice

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) 69 m/s
C) 20 m/s
D) 34 m/s
E) We cannot solve this problem without knowing the mass of the bead.