Engineering Mechanics
Two forces are acting at an angle of 120°. The bigger force is 40 N and the resultant is perpendicular to the smaller one. The smaller force is

20 N
None of the listed here
40 N
120 N

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Engineering Mechanics
The term 'Centroid' is

None of the listed here
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
The same as centre of gravity
The point of suspension

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