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Introduction
Introduction
What is force
What is force
Effects of Force
Effects of Force
Effects of Force:
Effects of Force:
Brings an object to motion.
Brings a moving object to rest.
Changes the speed of motion.
Changes the direction of motion.
Changes the shape of the object.
Contact and non-contact forces
Contact and non-contact forces
How much is 1 Newton?
How much is 1 Newton?
Effects of Force
Effects of Force
Try demo yourself
Try demo yourself
What is inertia
What is inertia
Inertia of rest
Inertia of rest
Inertia of Motion
Inertia of Motion
Scratch your head: (Observe the videos and answer the questions)
What do passengers experience when sudden brakes are applied to a moving bus?
What do passengers experience when the the bus is accelerated suddenly?
What can be said about the direction of force applies and the direction of movement of passengers?
What is inertia?
Force generates Pressure: Fluid pressure
Force generates Pressure: Fluid pressure
Can you tell?
Can you tell?
What do the dots and arrows in the diagram represent ?
What is your observation about the appearance of the two balloons?
What is the difference in two given set up of apparatus ?
What is the reason behind the difference in appearance of the two balloons?
Which principle is demonstrated in the diagram?
How to demonstrate the same principle using a different set of apparatus ?
How does air exert pressure?
What is air pressure? How to measure air pressure?
How to calculate atmospheric pressure at a place?
Observe the video and answer the questions
Why does atmospheric pressure change with altitude?
Why does atmospheric pressure change with altitude?
Why do mountaineers carry oxygen cylinder in high altitudes?
Why people get bleeding nose while travelling in aeroplanes?
Why do monsoon winds flow?
Why are ocean currents formed?
Why are there sea breeze land breeze, mountain breeze and valley breeze ?
What is byoyancy?
What is byoyancy?
When upthrust is greater than the weight the object floats. When upthrust is less than the weight of the object, it sinks!
Apparent weight and upthrust
Apparent weight and upthrust
There is loss in weight observed when an object is immersed in liquid. Weight in liquid is called the apparent weight.
Density and relative density!
Density and relative density!
Archimedes principle:
Archimedes principle:
Object, when immersed in liquid, displaces the liquid equal to its volume.
Object, when immersed in liquid, displaces the liquid equal to its volume.
This is the reason why a piece of iron sinks in water but a huge ship made up of iron can float on water.
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