1. A force of 6 N acts on a small body pushing it vertically upwards. Simultaneously, another force of 9 N acts on it pushing it vertically downwards. The resultant of the two forces is _______.   3 N upwards   15 N upwards   3 N downwards   15 N downwards   Hint Half-n-half Clue   2. The SI unit of moment is   N/m2   N m   N/m   Half-n-half Clue   3. The resultant of two forces acting at a point can be determined by using the 'Parallelogram of Forces'.   True   False   4. Two equal and opposite forces acting at a point are in equilibrium.   True   False   5. Two forces acting at right angles, which have the same effect as a single force, are called _______.   constituents   components   resultants   Half-n-half Clue   6. The moment of a force is inversely proportional to the turning effect of the force.   True   False   7. The center of gravity of a thin rectangular metal plate is at the   intersection of its diagonals.   one of the vertices.   midpoint of the longer side.   midpoint of the shorter side.   Half-n-half Clue