# Engineering mechanics objective

1.The unit of force in S.I. units is ? newton

2.The unit of work or energy in S.I. units is ? joule

3. The unit of power in S.I. units is ? wat

4. Forces are called concurrent when their lines of action meet in ? one point

5. Forces are called coplanar when all of them acting on body lie in ?  one plane

6.A force acting on a body may ?

introduce internal stresses

balance the other forces acting on it

retard its motion

change its motion
7.Which of the following is not the unit of distance ?
milestone
8. When trying to turn a key into a lock, following is applied ?  couple
9. Which of the following is not a scalar quantity ?  acceleration.
10. A number of forces acting at a point will be in equilibrium if  ?
11. If two equal forces of magnitude P act at an angle 9°, their resultant will be ?
IP cos 9/2
12. The algebraic sum of the resolved part of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of ?
Resolution of forces
13. The resolved part of the resultant of two forces inclined at an angle 9 in given direction is equal to ?
The algebraic sum of the resolved part of the forces in the given direction
14. The weight of a body is due to ?
gravitational force of attraction towards the center of the earth
15. The forces which meet at one point, but their line of action do not lie in a plane, are called ?
non-coplanar concurrent forces
16. Which of the following is a vector quantity ?
momentum
17.  A number of forces acting at a point will be in equilibrium if  ?
Sum of resolved parts in any two per-pendicular direction are both zero
18. Two non-collinear parallel equal forces acting in opposite direction ?
Constitute a couple
19. Law of triangle of forces ?
If three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium
20. D'Alembert's principle is used for ?
reducing the problem of kinetics to equivalent statics problem
21. According to Lami's theorem ?
If three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
22. Two coplanar couples having equal and opposite moments ?
can not balance each other
23. A framed structure is perfect if it contains members equal to  ?
2n-3
24. The product of either force of couple with the arm of the couple is called /
moment of the couple
25. The center of gravity of a uniform lamina lies at ?
the mid point of its axis
26. Center of gravity of a solid cone lies on the axis at the height ?
one-fourth of the total height above base
27. Center of percussion is ?
the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
28. Center of gravity of a thin hollow cone lies on the axis at a height of ? one-third of the total height above base
29. Vector quantity ? Momentum
30. The unit of force in S.I. system of unit is ? Newton
31. One Kg of force is equal to  ?9.8 N
32. The process of finding out the resultant force is called ______of forces ?Composition
33.  Concurrent forces are those forces whose lines of action ?
Meet at one point
34. The forces which meet at one point and their lines of action also lie on the same plane, are known as ?
Coplanar Concurrent forces
35.  Center of percussion is ?
The point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis

sum of resolved parts in any two per-pendicular directions are both zero