Applied Mechanics and Graphic Statics
The resolved part of the resultant of two forces inclined at an angle θ in a given direction is

Algebraic sum of the resolved parts of the forces in the direction
Difference of the forces multiplied by cosine θ°
Arithmetical sum of the resolved parts of the forces in the direction
Sum of the forces multiplied by the tangent θ°

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Applied Mechanics and Graphic Statics
The following statement is one of the laws of Dynamic friction

For moderate speeds the force of friction remains constant but decreases slightly with the increase of speed
All of these
The force of friction always acts in a direction opposite to that in which a body is moving
The magnitude of the kinetic friction bears a constant ratio to the normal reaction between two surfaces. The ratio being slightly less than that in the case of limiting friction

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

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

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