YR 8 - Physics [Pressure + Motion] Flashcards
What causes pressure?
Pressure is caused by the collision of particles.
In what direction does pressure in gas go?
Pressure in gases is exerted in all directions.
What is pressure?
Pressure is a measure of force over an area.
How is gas pressure affected?
Gas pressure is affected by changes in temperature and volume.
What is weight and what is it measured in?
Weight is a force measured in N.
What is density?
Density is a measure of mass per unit of volume.
How can the weight of an object be measured?
The weight of an object can be measured with a force meter.
How does pressure in liquids increase?
Pressure in liquids increases with depth.
What do objects that are less dense than water do?
Objects that are less dense tan water will on it.
What do objects that are more dense than water do?
Objects that are more dense than water will sink in it.
What is the equation for pressure on solids?
Pressure on solids = force ÷ area the force is applied over (N/m²)
How do snowshoes reduce pressure?
Snowshoes reduce pressure as they spread force over a large area.
What are balanced forces?
Forces that act equally and in opposite directions are said to be balanced.
What happens when forces are unbalanced?
Changes in speed or direction occur when forces are unbalanced.
What will happen if forces on an object are balanced?
If the forces on an object are balanced, it will travel at a constant speed.
