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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.

If a man pushes a door with a force of 4 N, then the moment he exerts about the hinge 70 cm away is _______.

  2.8 N m

  5.6 N m

  280.0 N m

  560.0 N m

  Half-n-half Clue
 

2.

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
 

3.

An object with a high center of gravity is more stable than an object with a low center of gravity.

  True

  False

 

4.

The center of gravity of a body is the point about which all the clockwise moments equal all the anticlockwise moments.

  True

  False

 

5.

The SI unit of moment is

  N/m

  N m

  N/m2

  Half-n-half Clue
 

6.

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 30 cm from the fulcrum, then the center of gravity of the stick is _______ cm away from the fulcrum.

  40

  90

  12

  4

  Half-n-half Clue
 

7.

The center of gravity of a thin rectangular metal plate is at the

  midpoint of the shorter side.

  intersection of its diagonals.

  one of the vertices.

  midpoint of the longer side.

  Half-n-half Clue
 


 
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