Engineering Mechanics
A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. 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

Slant down towards direction of pull
Slant up towards direction of pull
None of these
Remain horizontal

ANSWER DOWNLOAD EXAMIANS APP

Engineering Mechanics
For any system of coplanar forces, the condition of equilibrium is that the

All of these
Algebraic sum of moments of all the forces about any point should be zero
Algebraic sum of the vertical components of all the forces should be zero
Algebraic sum of the horizontal components of all the forces should be zero

ANSWER DOWNLOAD EXAMIANS APP

Engineering Mechanics
Which is the correct statement about law of polygon of forces?

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
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
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
If a polygon representing forces acting at a point is closed then forces are in equilibrium

ANSWER DOWNLOAD EXAMIANS APP
MORE MCQ ON Engineering Mechanics