Moment of a Force
As previously discussed a force can cause an object to move.
When a force acts on some objects that contain a fulcrum or pivot it creates a turning effect or moment of a force.
When a force acts on some objects that contain a fulcrum or pivot it creates a turning effect or moment of a force.
Equilibrium
When forces act on both side of a fulcrum the object may become in a state of equilibrium or said to be balanced.
For an object in equilibrium two conditions apply:
1. The principle of moments applies, that is:
The Sum of the Clockwise Moments = The Sum of the Anticlockwise Moments
2. The sum of the forces in any direction is equal to the sum of the forces in the opposite direction.
For an object in equilibrium two conditions apply:
1. The principle of moments applies, that is:
The Sum of the Clockwise Moments = The Sum of the Anticlockwise Moments
2. The sum of the forces in any direction is equal to the sum of the forces in the opposite direction.
Centre of Gravity
Because of the weight of the the parts of object itself, objects have a center of gravity.
The centre of gravity of a body is the point through which the resultant gravitational force on the
body acts.
For a symmetrical object it is easy to determine the point midway within the object where once supported the object balances.
It is however not as easily identifiable for an irregular object,
The centre of gravity of a body is the point through which the resultant gravitational force on the
body acts.
For a symmetrical object it is easy to determine the point midway within the object where once supported the object balances.
It is however not as easily identifiable for an irregular object,