Engineering mechanica MCQ (Law of Forces and Analysis)

  Engineering mechanica MCQ (Law of Forces and Analysis)

11. The resultant force of five coplanar forces can be found out by

(a) Law of polygon (b) Laws of equilibrium (c) Law of parallelogram (d) Lami's Theorem

Ans : (a)

12. Point of application of all force in concurrent system is:  (a) one point (b) two point (c) perpendicular plane (d) plane  Ans : (a)  13. What term is used for the combined effect of all the forces on a body (a) Load (b) Stress (c) Strain (d) None of the above  Ans : (a)  14. The dimensional formula of the force is––––––– (a) MLT2              (b) MLT–2 (c) MLT–1            (d) ML–1T–1 Ans. b 15. Two forces act at an angle of 1200. If the greater force is 50 N and their resultant is perpendicular to the smaller force, the smaller force is ........ N (a) 20               (b) 25 (c) 30               (d) 35 Ans : (b) 16. A weight of 1000 N is supported by two chains as shown in Figure. What will be the tension in Chain-1 and Chain-2 respectively? (a) 500 N; 866 N 17. The algebric sum of all the force acting on a body is zero, then the body may be in equilibrium provide the force are

(a) Parallel
(b) Like parallel
(c) Unlike parallel
(d) Concurrent

Ans : (d)

18. If a number of forces are acting at a point, the
resultant will be inclined at an angle θwith the
horizontal, such that

(a) tan = ∑H /  ∑V

(b) tan = ∑V /  ∑H

(c) tan = ∑V ×  ∑ H

(d) None of these

Ans : (b)

19. What is the effect of force applied on a rigid
body?
(a) acceleration

(b) retardation

(c) changing direction of motion
(d) all of the above

Ans : (d) 

20. ..................... is the force or torque that is
necessary just to initiate motion from rest.

(a) Backlash
(b) Terminal
(c) Static calibration
(d) Stiction

Ans : (d)