A. the floor is smooth, the wall is rough
B. the floor is rough, the wall is smooth
C. the floor and wall both are smooth surfaces
D. the floor and wall both are rough surfaces
E. will be in equilibrium under all conditions
Related Mcqs:
- 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 - On a ladder resting on smooth ground and leaning against vertical wall, the force of friction will be___________________?
A. towards the wall at its upper end
B. away from the wall at its upper end
C. upwards at its upper end
D. downwards at its upper end
E. none of the above - The center of percussion of a solid cylinder of radius r resting on a horizontal plane will be_________________?
A. r/2
B. 2r/3
C. r/A
D. 3r/2
E. 3r/A - 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 - A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is_______________?
A. 0°
B. 30°
C. 45°
D. 60°
E. 90°. - The necessary condition for forces to be in equilibrium is that these should be_________________?
A. coplanar
B. meet at one point ;
C. both A. and B. above
D. all be equal
E. something else - A number of forces acting at a point will be in equilibrium if_____________________?
A. their total sum is zero
B. two resolved parts in two directions at right angles are equal
C. sum of resolved parts in any two per-pendicular directions are both zero
D. all of them are inclined equally
E. none of the above - If a rigid body is in equilibrium under the action of three forces, then _____________________?
A. these forces are equal
B. the lines of action of these forces meet in a point
C. the lines of action of these forces are parallel
D. B. and C. above
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 - The coefficient of friction depends on________________?
A. area of contact
B. shape of surfaces
C. strength of surfaces
D. nature of surface
E. all of the above
