Shape Shape Shape Shape
Thrust And Pressure
Chapter Name : Gravitation
Sub Topic Code : 101_09_10_05_04
Topic Name : Thrust And Pressure
Sub Topic Name : Why Objects Float Or Sink When Placed On The Surface Of Water
Introduction

Whether an object will float or sink depends on its density relative to the density of the fluid it is immersed in.

Pre-Requisites:

Gravity, Buoyancy, Pressure exerted by Fluids

Activity:

Experiment with different objects and see whether they float or not. First predict what will happen and then test it out.

Real Life Question:

A blade floats while a pin sinks. Though both have same mass and density. How is that possible?

Key Words / FlashCards
Key Words Definitions (pref. in our own words)
Buoyant Force/ Up thrust Upward force exerted by water on an object
Density Mass per unit volume
Learning aids / Gadgets
Gadgets How it can be used
Applet Explain with animations – objects tht float and that don’t
Real life uses :

Boats and Ships, submarines

Places to visit :

Shipping Industry

Practical examples around us
Examples Explainations
Ships, Boats This entire use of water as a transport system is soly on the fact is that ships/boats float
What you learn in Theory:

Some objects float and some don’t. Depends on density.

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