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1) A 0.20-kg mass is oscillating on a spring over a horizontal frictionless surface. When it is at a displacement of 2.6 cm for equilibrium it has a kinetic energy of 1.4 J and a spring potential energy of 2.2 J. What is the maximum speed of the mass during its oscillation (in m/s)?
Which of the following statements is most closely associated with Newton’s Third Law of Motion?
选项： A:“What goes up must come down.”
B:“For every action force, there is an equal but opposite reaction force.”
C:“An object at rest remains at rest.”
D:“The acceleration of an object is directly proportional to the force acting on the object but inversely proportional to the mass of the object.”
E:“The Universe tends toward disorder.”
