Question 14. Which of the following statements is NOTtrue about the components of a vector?

Any vector can be resolved into rectangularcomponents

Any vector can be resolved into non-rectangularcomponents

Components are rectangular when a vector is resolvedalong mutually perpendicular axes

Components are non-rectangular when a vector isresolved along axes forming 45 degree 

None of the above

 

Question 15. Which of the following methods is moreappropriate when adding more than two vector?

Parallelogram method (law)

Triangle method (rule)

Components method

Trigonometric method

All of the above

 

Question 16. Which of the following statements is thedefinition of the moment arm d of aforce F about a point O?

The moment arm is the distance from the point O to thetail of the force F

The moment arm is the distance from the point O to thetip of the force F

The moment arm is the distance from the point O to themid-point of the force F

The moment arm is the perpendicular distance from thepoint O to the line of action of force F

None of the above

 

Question 17. Which of the following statements is NOTtrue about the moment M about point O,of a force F acting at a moment armdistance d?

The moment of a force is proportional to both themagnitude of a force and the moment arm

The moment of a force is proportional to the magnitudeof a force but inversely proportional to the moment arm

A moment of a force is its ability to cause a body torotate

The moment of a force is also known astorque

None of the above

 

Question 18. Which of the following statements is trueabout the relationship between the moment M, aboutpoint O, of a force F acting at amoment arm distance d?

The moment M is the product of theforce F and the moment arm d

The moment M is the ratio of theforce F to the moment arm d

The moment M is the ratio of themoment arm d to the force F

The moment M is the sum of theforce F and the moment arm d

None of the above

 

 

Question 19. Which of the following states theVarignon’s theorem?

The forces of action and reaction between interactivebodies always have the same magnitudes and oppositedirection

In two dimensional case, moments can be addedalgebraically

The moment of a force about a point is the same as themoment of its vertical component about the same point

The position, along the line of action, of the pointof application of a force acting on a rigid body, does not alterthe conditions of equilibrium or motion of the body

None of the above

 

Question 20. Which of the following statementscharacterizes a set of two forces forming a couple?

The two forces are equal in magnitudes

The two forces are of opposite directions

The lines of action of two forces distinct andparallel

A, B, and C

None of the above