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

ANSWER DOWNLOAD EXAMIANS APP

Applied Mechanics and Graphic Statics
A body is said to move with Simple Harmonic Motion if its acceleration, is

Proportional to the distance from the point of reference and directed towards it
Inversely proportion to the distance from the point of reference
Always directed away from the centre, the point of reference
Proportional to the square of the distance from the point of reference

ANSWER DOWNLOAD EXAMIANS APP