1. A mass of 70 g is attached at one end of a rod, and a mass of 30 g is attached at the other end. If the length of the rod is  60 cm, then the fulcrum should be placed _______ cm away from the 70 g mass for the rod to balance.   42   18   24   36   Hint Half-n-half Clue   2. A force of 3 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 _______.   6 N upwards   6 N downwards   12 N upwards   12 N downwards   Half-n-half Clue   3. A funnel that is balanced upright on a table on its narrow tip is in _______ equilibrium.   neutral   stable   unstable   Half-n-half Clue   4. An object with a high center of gravity is more stable than an object with a low center of gravity.   True   False   5. The point where all the _______ of an object appears to be concentrated is called its center of gravity.   centrifugal force   centripetal force   weight   density   Half-n-half Clue   6. The moment of a force is inversely proportional to the turning effect of the force.   True   False   7. An inverted funnel placed on a table is in _______ equilibrium.   stable   neutral   unstable   Half-n-half Clue