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

Algebraic sum of the moments of the forces about the point is zero
Algebraic sum of the forces is zero
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

ANSWER DOWNLOAD EXAMIANS APP

Applied Mechanics and Graphic Statics
The masses of two balls are in the ratio of 2 : 1 and their respective velocities are in the ratio of 1 : 2 but in opposite direction before impact. If the coefficient of restitution is ½, the velocities of separation of the balls will be equal to

Half the original velocity in the opposite direction
Original velocity in the opposite direction
Half the original velocity in the same direction
Original velocity in the same direction

ANSWER DOWNLOAD EXAMIANS APP

Applied Mechanics and Graphic Statics
Parallelogram Law of Forces states, "if two forces acting simultaneously on a particle be represented in magnitude and direction by two adjacent sides of a parallelogram, their resultant may be represented in magnitude and direction by

Its shorter side
The diagonal of the parallelogram which passes through the point of intersection of the forces
The diagonal of the parallelogram which does not pass through the point of intersection of the forces
Its longer side

ANSWER DOWNLOAD EXAMIANS APP