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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.

  centrifugal force

  centripetal force

  weight

  density

  Half-n-half Clue
 

2.

If a man pushes a door with a force of 3 N, then the moment he exerts about the hinge 70 cm away is _______.

  2.1 N m

  4.2 N m

  210.0 N m

  420.0 N m

  Half-n-half Clue
 

3.

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  50 cm, then the fulcrum should be placed _______ cm away from the 70 g mass for the rod to balance.

  35

  30

  15

  20

  Half-n-half Clue
 

4.

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

  intersection of its diagonals.

  one of the vertices.

  midpoint of the shorter side.

  midpoint of the longer side.

  Half-n-half Clue
 

5.

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

  stable

  neutral

  unstable

  Half-n-half Clue
 

6.

funnel equilibrium A funnel lying horizontally on its side at rest on a table is in _______ equilibrium.

  unstable

  stable

  neutral

  Half-n-half Clue
 

7.

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.

  120

  20

  5

  50

  Half-n-half Clue
 


 
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