Applied Mechanics and Graphic Statics
The maximum displacement of a particle executing S.H.M. corresponds to

Maximum kinetic energy and maximum potential energy
Minimum kinetic energy and minimum potential energy
Zero potential energy and maximum kinetic energy
Zero kinetic energy and maximum potential energy

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Applied Mechanics and Graphic Statics
Kinetic friction may be defined as

Friction force acting when the body is in motion
Ratio of limiting friction and normal reaction
Angle between normal reaction and resultant of normal reaction and limiting friction
Friction force acting when the body is just about to move

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