1017Civil EngineeringMedium
A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if________?
Athe floor is rough, the wall is smooth
Bthe floor is smooth, the wall is rough
Cthe floor and wall both are smooth surfaces
Dwill be in equilibrium under all condi-tions
Ethe floor and wall both are rough sur-faces
Correct answer
C. the floor and wall both are smooth surfaces
Explanation
The correct answer is the floor and wall both are smooth surfaces.