According to which law, every action has an equal and opposite reaction?

Forces passing through a common point are known as _____

A. collinear forces

B. co-planer forces

C. concurrent forces

D. none of the above

Varignon's theorem is used to find ________

A. direction of resultant force

B. location of resultant force

C. magnitude of resultant force

D. nature of resultant force

Couple is formed due to two ______

A. like, parallel and non-collinear forces of same magnitude

B. like, perpendicular and collinear forces of different magnitude

C. unlike, parallel and non-collinear forces of same magnitude

D. unlike, perpendicular and non-collinear forces of different magnitude

Which of the following laminas do not have centroid at its geometrical centre?

A. Circle

B. Equilateral triangle

C. Right angled triangle

D. None of the above

If a material has no uniform density throughout the body, then the position of centroid and center of mass are ________

A. identical

B. not identical

C. independent upon the density

D. unpredictable