Advanced forces

Created by

Shana Girn

Cards (55)

What are contact forces?
Forces that only act when two things are touching.
What are non-contact forces?
Forces that can act when things are not touching.
What are the units for measuring forces?
Newtons.
What is drag force?
It is the force acting on an object moving through air or water that causes it to slow down.
How does friction affect motion?
Friction slows things down when they move on a surface.
What does it mean for an object to be streamlined?
It means the object is shaped to reduce friction or air resistance.
What is the law of moments?
An object is in equilibrium if the clockwise moments equal the anticlockwise moments.
What is upthrust?
The force on an object in liquid or gas that pushes it up.
What is a moment in physics?
A measure of the ability of a force to rotate an object around a pivot.
What does elastic mean in terms of materials?
Something that stretches and springs back to its normal shape.
What does it mean to deform an object?
It means to change its shape.
What does it mean to compress an object?
It means to squash the object.
What is extension in terms of forces?
The difference between the original length of an object and the length when a force is applied.
What is pressure in physics?
The ratio of force to surface area, measured in N/m², and how it causes stresses in solids.
What is liquid pressure?
The pressure produced by collisions of particles in a liquid.
What does equilibrium mean in physics?
When all of the forces on something are balanced and cancel out.
What are contact forces?
Forces that only act when two things are touching
What are non-contact forces?
Forces that can act when things are not touching
What are the units for measuring forces?
Newtons
What is drag force?
It is the force acting on an object moving through air or water that causes it to slow down
How does friction affect motion?
Friction slows things down when they move on a surface
What does it mean for an object to be streamlined?
It means the object is shaped to reduce friction or air resistance
What is the law of moments?
An object is in equilibrium if the clockwise moments equal the anticlockwise moments
What is upthrust?
The force on an object in liquid or gas that pushes it up
What is a moment in physics?
A measure of the ability of a force to rotate an object around a pivot
What does it mean for something to be elastic?
It stretches and springs back to its normal shape
What does it mean to deform an object?
It means to change its shape
What does it mean to compress an object?
It means to squash the object
What is extension in terms of forces?
The difference between the original length of an object and the length when a force is applied
How is pressure defined in physics?
It is the ratio of force to surface area, measured in N/m²
What is liquid pressure?
The pressure produced by collisions of particles in a liquid
What does equilibrium mean in physics?
It means all of the forces on something are balanced and cancel out
What is the unit of measurement for moments?
Newton meters (Nm)
How is a moment calculated? 
Moment is calculated using the equation: $\text{moment (Nm)} =$ $\text{force (N)} \times \text{distance from pivot (m)}$
What happens to the moment when the distance from the pivot increases? 
The moment increases with distance from the pivot.
What is a resultant force? 
The resultant force is the overall force acting on an object when all forces are combined.
What are the key types of forces?
**Contact force**: Acts when objects are touching.
**Non-contact force**: Acts at a distance (e.g., gravity).
**Resultant force**: Overall force from combined forces.
**Friction**: Slows down movement on surfaces.
**Air resistance**: Friction acting on objects moving through air.
What is Hooke's Law? 
Hooke's Law states that the force needed to extend or compress a spring is proportional to the distance it is stretched or compressed.
What are the properties of pressure in liquids? 
**Incompressible**: Liquids cannot be easily compressed.
**Pressure increases with depth**: More depth means more pressure.
**Pressure spreads out**: Pressure is transmitted equally in all directions.
How does pressure change with depth in a liquid? 
Pressure increases linearly with depth in a liquid.