1. A chalkstick that is balanced upright on a table is in _______ equilibrium.   unstable   stable   neutral   Hint Half-n-half Clue   2. 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   36   18   24   Half-n-half Clue   3. There are fundamentally _______ kinds of equilibrium.   two   four   three   Half-n-half Clue   4. The resultant of two forces acting at a point can be determined by using the 'Parallelogram of Forces'.   True   False   5. A force of 3 N acts on a small body pushing it vertically upwards. Simultaneously, another force of 7 N acts on it pushing it vertically downwards. The resultant of the two forces is _______.   4 N downwards   10 N upwards   10 N downwards   4 N upwards   Half-n-half Clue   6. The _______ of a force is the product of the force and the shortest distance from a point to the line of action of the force.   stability   momentum   moment   Half-n-half Clue   7. If a walking stick with a mass of 300 g can be balanced by placing a mass M of 120 g at a distance L of 20 cm from the fulcrum, then the center of gravity of the stick is _______ cm away from the fulcrum.   60   40   8   4   Half-n-half Clue