SCIENCE (NOTE)
Tuesday 16 October 201202:46
STABILITY
- AN OBJECT IS SAID TO BE STABLE IF IT DOES NOT TOPPLE EASILY
- THE STABILITY OF AN OBJECT IS AFFECTED BY THE :
- POSITION OF THE CENTRE OF GRAVITY
^-^ THE LOWER THE POSITION OF THE CENTRE OF GRAVITY,THE MORE STABLE THE
OBJECT
- BASE AREA
^-^ THE BIGGER THE BASE AREA,THE MORE STABLE THE OBJECT
3. A STABLE OBJECT SHOULD HAVE A LOW CENTRE OF GRAVITY AND LARGE BASE
AREA
4. THE CENTRE OF GRAVITY OF AN OBJECT CAN BE LOWERED BY :
- REDUCING THE HEIGHT OF AN OBJECT
- INCREASING THE WEIGHT OF THE BOTTOM PART OF THE OBJECT
5. EXAMPLES OF THE APPLICATION OF STABILITY IN EVERYDAY LIFE :
- A RACE CAR IS HEAVY,HAS A LOW CENTRE OF GRAVITY AND A LARGE BASE AREA
- A PERSON LIFTING WEIGHTS WILL SPREAD OUT HIS LEGS TO HAVE A LARGER BASE AREA
- CHAIRS,TABLES,BEDS AND CUPBOARDS ARE OBJECTS WITH LOW CENTRES OF GRAVITY AND WIDE BASES
- THE PASSENGERS IN A BOAT ARE ASKED TO SIT IN ORDER TO KEEP THE CENTRE OF GRAVITY LOW
- SHIPS AND BOATS ARE FILLED WITH HEAVY CARGO BEFORE SAILING
- THE PASSENGERS IN A DOUBLE-DECKER BUS ARE ADVISED TO FILL UP THE LOWER DECK FIRST.THE PASSENGERS IN THE UPPER DECK ARE NOT ALLOWED TO STAND
- HEAVY VEHICLES ARE BUILT FROM HEAVY MATERIAL.THEIR CENTRES OF GRAVITY ARE LOWERED BY FIXING THE HEAVY ENGINES BENEATH THEIR BODIES
