Applied Mechanics and Graphic Statics
The following is not a law of static friction:

The force of friction is dependent upon the area of contact
The magnitude of the limiting friction bears a constant ratio to the normal reaction between two surfaces
The force of friction always acts in a direction opposite to that in which the body tends to move
The force of friction depends upon the roughness of the surface

ANSWER DOWNLOAD EXAMIANS APP

Applied Mechanics and Graphic Statics
A point subjected to a number of forces will be in equilibrium, if

Two resolved parts in any two directions at right angles are equal
Sum of resolved parts in any two directions at right angles, are both zero
Algebraic sum of the forces is zero
Algebraic sum of the moments of the forces about the point is zero

ANSWER DOWNLOAD EXAMIANS APP

Applied Mechanics and Graphic Statics
One end of an elastic string of natural length ‘l’ and modulus ‘X’ is kept fixed while to the other end is attached a particle of mass m which is hanging freely under gravity. The particle is pulled down vertically through a distance ‘x’, held at rest and then released.The motion is

A simple harmonic motion
None of these
A rectilinear motion with constant speed
A damped oscillatory motion

ANSWER DOWNLOAD EXAMIANS APP