1. PRESSURE LET US START WITH AN ACTIVITY AREA
YOU NEED A GLASS TUMBLER, GLASS BOWL AND WATER
FILL THE BOWL WITH WATER
NOW PUSH THE INTO WATER IN THE BOWL.
DON’T YOU FEEL A RESISTANCE OR FORCE WHICH IS PUSHING THE GLASS UPWARDS?
A FORCE WHICH IS ACTING VERTICALLY DOWNWARDS OR NORMAL TO THE SURFACE IS CALLED THRUST
SO PRESSURE CAN BE DEFINED AS THRUST
AREA

2. APPLICATIONS OF PRESSURE
CUTTING AN APPLE WITH BLUNT KNIFE IS DIFFICULT COMPARED TO CUTTIN GIT WITH A SHARP KNIFE
REMEMBER FOR THE SAME FORCE OR WEIGHT(APPLE), IF THE AREA IS LESS
( AREA OF THE SHARP PORTION OF KNIFE) THE VALUE OF PRESSURE WILL
INCREASE MAKING US EASIER TO CUT THE APPLE .
CARRYING A BAG WITH WIDE STRAPS IS EASIER THAN CARRYING A BAG WITH THIN STRAPS
REMEMBER FOR THE SAME FORCE OR WEIGHT (BAG), IF THE AREA IS MORE
(WIDE STRAPS), THEN THE VALUE OF PRESSURE WILL DECREASE. SO THE
WEIGHT OF THE BAG WILL BE DISTRIBUTED OVER A LARGER AREA.
REMEMBER: PRESSURE = FORCE
AREA

3. UNIT OF PRESSURE REMEMBER 1N/(m x m) = 1 pascal
UNIT OF FORCE IS IN NEWTONS (N)
UNIT OF AREA IS IN SQUARE METRE (METRE X METRE)
THEREFORE UNIT OF PRESSURE = N/ (m x m)
REMEMBER 1N/(m x m) = 1 pascal

4. CHARACTERISTICS OF LIQUID PRESSURE
DID WATER COME OUT THROUGH ALL THE HOLES?
FROM WHICH HOLE DID THE WATER FALL THE FARTHEST DISTANCE?
FROM WHICH HOLE DID THE WATER FALL THE CLOSEST TO THE BASE OF THE BOTTLE?
THINK OF AN APPLICATION AND NARRATE

5. CHARACTERISTICS OF LIQUID PRESSURE
HOLES ARE MADE AT THE SAME LEVEL OF A BOTTLE.
WHAT IS THE CONCLUSION?
THINK OF ANY APPLICATIONS OF LIQUID PRESSURE

6. ATMOSPHERIC PRESSURE
The standard atmosphere is equivalent to 760 mmHg.
What does it mean? 

7. APPLICATIONS
WHAT IS HAPPENING IN THE ABOVE CASES?

8. MEASURING FLUID PRESSURE
BAROMETER
MANOMETER