Q1
What does Archimedes' Principle state?
AUpthrust equals weight of displaced fluid
BUpthrust equals the object's weight always
CUpthrust has no relationship to fluid
DObjects always sink regardless of upthrust
ICSEClass 9 (ICSE)PhysicsCh 5 · Topic 2
Practice and Revision - Upthrust in Fluids, Archimedes' Principle and Floatation
Let us practise and revise what we learned about upthrust in fluids, archimedes' principle and floatation. Upthrust is the upward force flui
Core concept
Archimedes' Principle states that the upthrust on a submerged object equals the weight of fluid displaced by that object.
How it works
An object floats if its weight is less than or equal to the maximum upthrust (weight of fluid it can displace), and sinks if weight exceeds this.
Why it matters
The concept of density helps explain floatation - objects less dense than the fluid float, while denser objects sink.
Key detail
Understanding upthrust and floatation explains why ships (despite being heavy) float, and helps design vessels and swimming aids.
Exam highlight
Key diagram
Keywords worth remembering
Trending
upthrust in fluidsarchimedes' principle and floatationicse class 9
Most searched
ICSE class 9 upthrust in fluidsarchimedes' principle and floatation
Study resources
Notes & downloads
Quick notes
• Archimedes' Principle: upthrust equals weight of displaced fluid.
• Objects float if weight ≤ maximum upthrust.
• Objects sink if weight exceeds upthrust.
• Density determines floatation.
• Less dense objects than the fluid float.
• Denser objects sink.
• This explains why heavy ships float.
• It helps design vessels and swimming aids.