- (A) area of contact
- (B) shape of surfaces
- (C) strength of surfaces
- (D) nature of surface
- (E) all of the above
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- (A) coefficient of friction
- (B) angle of friction
- (C) angle of repose
- (D) sliding friction
- (E) friction resistance
- (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
- (A) post friction
- (B) limiting friction
- (C) kinematic friction
- (D) frictional resistance
- (E) dynamic friction
- (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
- (A) 3t2-lt
- (B) 3t2+2t
- (C) 6f-8
- (D) 6f-4
- (E) 6t2-8t
- (A) 0°
- (B) 30°
- (C) 45°
- (D) 60°
- (E) 90°
- (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 sur-faces
- (E) will be in equilibrium under all condi-tions
- (A) balance each other
- (B) produce a couple and an unbalanced force
- (C) are equivalent
- (D) produce a moment of couple
- (E) can not balance each other
- (A) resultant couple
- (B) moment of the forces
- (C) resulting couple
- (D) moment of the couple
- (E) none of the above
