1. The center of gravity of a body is the point about which all the clockwise moments equal all the anticlockwise moments.   True   False   2. A pendulum at rest is in _______ equilibrium.   neutral   stable   unstable   Hint Half-n-half Clue   3. Three forces in equilibrium acting at a point can be represented in magnitude and direction by the sides of a triangle taken in order.   True   False   4. There are fundamentally _______ kinds of equilibrium.   three   two   four   Half-n-half Clue   5. If a man pushes a door with a force of 6 N, then the moment he exerts about the hinge 70 cm away is _______.   4.2 N m   8.4 N m   420.0 N m   840.0 N m   Half-n-half Clue   6. Two forces acting at right angles, which have the same effect as a single force, are called _______.   components   resultants   constituents   Half-n-half Clue   7. The moment of a force is inversely proportional to the turning effect of the force.   True   False