Engineering Mechanics
The resolved part of the resultant of two forces inclined at an angle 'θ' in a given direction is equal to

The algebraic sum of the resolved parts of the forces in the given direction
The sum of the resolved parts of the forces in the given direction
The sum of the forces multiplied by the sine of θ
The difference of the forces multiplied by the cosine of θ

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Engineering Mechanics
Angle of friction is the

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

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Engineering Mechanics
According to Newton's first law of motion,

Everybody continues in its state of rest or of uniform motion, in a straight line, unless it is acted upon by some external force
To every action, there is always an equal and opposite reaction
None of these
The rate of change of momentum is directly proportional to the impressed force, and takes place in the same direction, in which the force acts

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