Forces 4 Flashcards
What happens to pressure in water with increasing liquid depth
Pressure increases
What happens to the pressure of a liquid when the density increases
The pressure increases
Why is there atmospheric pressure
Due to air molecules colliding with surfaces
What happens to the air pressure when altitude increases
Pressure decreases
What is the equation for force when using pressure
Pressure difference x area of surface
What happens when an object is immersed into a fluid
It displaces a volume of fluid equal to its own volume
Why is there an upthrust on an object in a fluid
Caused by the pressure exerted by the fluid due to pressure increasing with depth
What is upthrust
is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object.
Why does an object sink
If it’s weight is greater than the upthrust on it when it’s fully immersed
