Question

A 0.20-kg particle moves along the xaxis under the influence of a conservative force. The potential energy is given by
U(x) = (8.0J/m2)x2+ (2.0J/m4)x4,
where xis in coordinate of the particle. If the particle has a speed of 5.0 m/s when it is at x= 1.0 m, its speed when it is at the origin is:
A) 0 m/s
B) 2.5 m/s
C) 5.7 m/s
D) 7.9 m/s
E) 11 m/s

Answer

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