The larger the surface area of an object, the more the upthrust.

1. Sacred Heart School,
MOGA
Presented by:-
Name = Sumer Sikri
Class = 9th c
ROLL no.= 39
Submitted to:-
Rohan Jain

2. Upthrust
and
Archimedes

3. WHAT ’ S UPTHRUST
Upthrust is a force that
only exists in fluids,
such as lakes, oceans,
swimming pools and
even cups of tea!
It is a push that always
goes straight up,
against the direction of
gravity.

4. UPTHRUST IN ACTION
This boat has gravity pushing it down, and the upthrust of the
water pushing up. Because the forces are balanced, the ship
floats.

5. The larger the surface area of
an object, the more the upthrust.
Shape Affects upthrust

6. Effect of Upthrust

7. UPTHRUST FORMULA
Upthrust = Weight of
object in air – Weight
of object in water

9. Biography
• Archimedes was born
around 287 B.C in the
Greek City.
• He is a Greek
mathematician, physicist,
and astronomer.
• He died around 212 B.C at
the age of 75.

10. Archimedes’ Principle
Archimedes Principle states that
when a body is immersed
partially or fully in a fluid, it
experiences an upward force.
This force is equal to the
weight of the fluid displaced by
it.

11. Archimedes’ principle
• Archimedes Principle states that when a
body is immersed partially or fully in a
fluid, it experiences an upward force.
This force is equal to the weight of the
fluid displaced by it.