The units of moment of inertia of an area are__________________?
A. kg m2
B. m4
C. kg/m2
D. m3
E. kg/m4
Engineering Mechanics
Center of percussion is___________________?
Center of percussion is___________________?
A. the point of C.G.
B. the point of metacentre
C. the point of application of the resultant of all the forces tending to cause a body to rotate about a certain axis
D. point of suspension
E. the point in a body about which it can rotate horizontally and oscillate under the influence of gravity
The center of gravity of a uniform lamina lies at____________________?
The center of gravity of a uniform lamina lies at____________________?
A. the center of heavy portion
B. the bottom surface
C. the mid point of its axis
D. all of the above
E. none of the above
The product of either force of couple with the arm of the couple is called_________________?
The product of either force of couple with the arm of the couple is called_________________?
A. resultant couple
B. moment of the forces
C. resulting couple
D. moment of the couple
E. none of the above
According to Lami’s theorem___________________?
According to Lami’s theorem___________________?
A. three forces acting at a point will be in equilibrium
B. three forces acting at a point can be represented by a triangle, each side being proportional to force
C. if three forces acting upon a particle are represented in magnitude and
direction by the sides of a triangle, taken in order, they will be in equilibrium
D. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
E. none of the above
D’ Alembert’s principle is used for______________________?
D’ Alembert’s principle is used for______________________?
A. reducing the problem of kinetics to equivalent statics problem
B. determining stresses in the truss
C. stability of floating bodies
D. designing safe structures
E. solving kinematic problems
According to law of triangle of forces __________________ ?
According to law of triangle of forces __________________ ?
A. three forces acting at a point will be in equilibrium
B. three forces acting at a point can be represented by a triangle, each side being proportional to force
C. 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
D. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two
E. none of the above
Which of the following is a vector quantity___________________?
Which of the following is a vector quantity___________________?
A. energy
B. mass
C. momentum
D. angle
E. speed
The forces, which meet at one point, but their lines of action do not lie in a plane, are called_________________?
The forces, which meet at one point, but their lines of action do not lie in a plane, are called_________________?
A. coplanar non-concurrent forces
B. non-coplanar concurrent forces
C. non-coplanar non-concurrent forces
D. intersecting forces
E. none of the above
Two non-collinear parallel equal forces acting in opposite direction__________________?
Two non-collinear parallel equal forces acting in opposite direction__________________?
A. balance each other
B. constitute a moment
C. constitute a couple
D. constitute a moment of couple
E. constitute a resultant couple