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:
- 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 do not have identical dimensions ?
A. Momentum and impulse
B. Torque and energy
C. Torque and work
D. Kinetic energy and potential energy
E. Moment of a force and angular momentum - Which of the following is not the unit of pressure ?
A. kg/cm
B. ata
C. atmosphere
D. mm of wcl
E. newton - The C.G. of a right circular solid cone of height h lies at the following distance from the base______________?
A. h/2
B. J/3
C. h/6
D. h/4
E. 3/i/5 - Which of the following is not the unit of energy_________________?
A. kg m
B. kcal
C. wattr
D. watt hours
E. kg m x (m/sec)2 - 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 a vector quantity___________________?
A. energy
B. mass
C. momentum
D. angle
E. speed - 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 - In the equation of virtual work, following force is neglected_______________________?
A. reaction of any smooth surface with which the body is in contact
B. reaction of a rough surface of a body which rolls on it without slipping
C. reaction at a point or an axis, fixed in space, around which a body is con-strained to turn
D. all of the above
E. none of the above
