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## School Physics Quiz : Stability & Moments

Answer the following questions based on stability & moments.

 Formats Info Page Quiz Review
Multiple choice

1.

The point where all the _______ of an object appears to be concentrated is called its center of gravity.
 weight centripetal force centrifugal force density

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 12 N upwards 6 N downwards 12 N downwards

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.

If a walking stick with a mass of 300 g can be balanced by placing a mass M of 150 g at a distance L of 40 cm from the fulcrum, then the center of gravity of the stick is _______ cm away from the fulcrum.
 5 120 20 50

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5.

A funnel that is balanced upright on a table on its narrow tip is in _______ equilibrium.
 unstable neutral stable

Half-n-half Clue

6.

Consider a thin rectangular plastic sheet. If a small piece of the plastic breaks off at one of the vertices, then the center of gravity of the remaining plastic (with respect to the original center of gravity)
 cannot be determined. will move towards the broken vertex. will not move. will move away from the broken vertex.

Half-n-half Clue

7.

A chalkstick that is balanced upright on a table is in _______ equilibrium.
 stable neutral unstable

Half-n-half Clue

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