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School Physics Quiz : Stability & Moments


Answer the following questions based on stability & moments.

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Multiple choice

Your Performance  

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

  Half-n-half Clue
 

5.

funnel equilibrium 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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