Upthurst force - year 7

Upthrust

LO : I can understand the direction of upthurst, objects

float when the upthurst balances the weight.

UPTHRUST – FORCE DIAGRAM PRACTICE

Upthrust is
a force that pushes
upwards on an
object submerged in
a fluid i.e. liquids and
gases · It is always
in the opposite
direction to the
object's weight.

Open Ended

What is the direction of upthrust

Draw force diagram exerting on this boat

Multiple Choice

Why do boats float ?

• Because of the material it made of

• Because of the upthrust force balances weight

• Because the number of passenger is not too high

• Because the boat is very light and it can float easily

What kind of friction in this situation ?