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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.

A sphere that is at rest on a table is in _______ equilibrium.

  stable

  neutral

  unstable

  Half-n-half Clue
 

2.

If a walking stick with a mass of 300 g can be balanced by placing a mass M of 180 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.

  24

  120

  60

  6

  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.

The SI unit of moment is

  N m

  N/m2

  N/m

  Half-n-half Clue
 

5.

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 away from the broken vertex.

  will move towards the broken vertex.

  will not move.

  Half-n-half Clue
 

6.

Two forces acting at right angles, which have the same effect as a single force, are called _______.

  resultants

  components

  constituents

  Half-n-half Clue
 

7.

There are fundamentally _______ kinds of equilibrium.

  four

  two

  three

  Half-n-half Clue
 


 
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