A. The C.G. of a circle is at its center
B. The C.G. of a triangle is at the intersection of its medians
C. The C.G. of a rectangle is at the inter-section of its diagonals
D. The C.G. of a semicircle is at a distance of r/2 from the center
E. The C-G. of an ellipse is at its center
Related Mcqs:
- Pick up wrong statement about friction force for dry surfaces. Friction force is________________?
A. proportional to normal load between the surfaces
B. dependent on the materials of contact surface
C. proportional to velocity of sliding
D. independent of the area of contact surfaces
E. none of the above is wrong statement - If n = number of members andy = number of joints, then for a perfect frame, n =_______________?
A. j-2
B.2j-l
C. 2/-3
D.3/-2
E. 2/ -4 - Which is the correct statement about law of polygon of forces ?
A. if any number of forces acting at a point can be represented by the sides
of a polygon taken in order, then the forces are in equilibrium
B. if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium
C. if a polygon representing forces acting at a point is closed then forces are in equilibrium
D. if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium
E. none of the above - A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal________________?
A. density of metal can’t be determined
B. metal is twice as dense as water
C. metal will float in water
D. metal is twice as dense as unknown fluid
E. none of the above - Which of the following is not the unit of power ?
A. kW (kilowatt)
B. hp (horse power)
C. kcal/sec
D. kg m/sec
E. kcal/kg sec - When trying to turn a key into a lock, following is applied___________________?
A. coplanar force
B. non-coplanar forces
C. lever
D. moment
E. couple - A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve___________________?
A. catenary
B. parabola
C. hyperbola
D. elliptical
E. circular arc - Which one of the following statements is not correct_________________?
A. the tangent of the angle of friction is equal to coefficient of friction
B. the angle of repose is equal to angle of friction
C. the tangent of the angle of repose is equal to coefficient of friction
D. the sine of the angle of repose is equal to coefficient to friction
E. none of the above - Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one________________?
A. ellipse
B. hyperbola
C. parabola
D. circle
E. none of the above - Which of the following is the example of lever of first order________________?
A. arm of man
B. pair of scissors
C. pair of clinical tongs
D. all of the above
E. none of the above
