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School Physics Quiz : Stability & Moments


Answer the following questions based on stability & moments.

Formats Info Page Quiz Review
Multiple choice

Your Performance  

1.

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

  90

  5

  50

  15

  Half-n-half Clue
 

2.

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

  neutral

  unstable

  stable

  Half-n-half Clue
 

3.

If a man pushes a door with a force of 4 N, then the moment he exerts about the hinge 80 cm away is _______.

  3.2 N m

  6.4 N m

  320.0 N m

  640.0 N m

  Half-n-half Clue
 

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.

Three forces in equilibrium acting at a point can be represented in magnitude and direction by the sides of a triangle taken in order.

  True

  False

 

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)

  will move towards the broken vertex.

  cannot be determined.

  will not move.

  will move away from the broken vertex.

  Half-n-half Clue
 

7.

A force of 6 N acts on a small body pushing it vertically upwards. Simultaneously, another force of 8 N acts on it pushing it vertically downwards. The resultant of the two forces is _______.

  2 N upwards

  2 N downwards

  14 N upwards

  14 N downwards

  Half-n-half Clue
 


 
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