A. r/2
B. 2r/3
C. r/A
D. 3r/2
E. 3r/A
Related Mcqs:
- A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is \i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________?
A. remain horizontal
B. slant up towards direction of pull
C. slant down towards direction of pull
D. unpredictable
E. none of the above - If a suspended body is struck at the center of percussion, then the pressure on die axis passing through the point of suspension will be_________________?
A. maximum
B. minimum
C. zero
D. infinity
E. same as the force applied - A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to________________?
A. W
B. W sin (a + $)
C. Wtan(a + <|))
D. W\an(a-)
E. Wtana - 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 percussion of the homogeneous rod of length L suspended at the top will be___________________?
A. L/2
B. L/3
C. 3L/4
D. 2L/3
E. 3L/8 - On the ladder resting on the ground and leaning against a smooth vertical wall, the force of friction will be_________________?
A. downwards at its upper end
B. upwards at its upper end
C. perpendicular to the wall at its upper end
D. zero at its upper end
E. none of the above - Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction___________________?
A. along the plane
B. horizontally
C. vertically
D. at an angle equal to the angle of friction to the inclined plane
E. unpredictable - From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate____________________?
A. 0.5 cm
B. 1.0 cm
C. 1.5 cm
D. 2.5 cm
E. 0.25 cm - The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of_______________?
A. friction
B. limiting friction
C. repose
D. kinematic friction
E. static friction - Center of gravity of a solid cone lies on the axis at the height _____________________?
A. one-fourth of the total height above base
B. one-third of the total height above base
C. one-half of the total height above base
D. three-eighth of the total height above the base
E. none of the above
