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.

Question

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.

Quizplus · Accepted Answer

The Answer of 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.

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