P8 Revision Flashcards
What are Vector quantities?
A vector quantity has magnitude and direction.
What are Scalar quantities?
A scalar quantity only has a magnitude.
Displacement
Vector
Momentum
Vector
Force
Vector
Acceleration
Vector
Velocity
Vector
Weight
Vector
Mass
Scalar
Distance
Scalar
Speed
Scalar
Temperature
Scalar
Pressure
Scalar
Work done
Scalar
Power
Scalar
Compression
Contact force
Tension
Contact force
Thrust
Contact force
Friction
Contact force
Air resistance
Contact force
Water resistance
Contact force
Drag
Contact force
Lift
Contact force
Upthrust
Contact force
Weight
Non-contact force
Magnetic force
Non-contact force
Electrostatic force
Non-contact force
Nuclear
Non-contact force
Equilibrium definition
An object at rest is in equilibrium.
Key conditions for an object to be in equilibrium
- The resultant force on the object is zero (all forces are the same).
- The forces acting on the object have no overall turning effect.
Centre of mass definition
The point at which the whole mass of an object is concentrated.
Describe the experiment to find the centre of mass of simple shapes
Hang a plumbline and the shape on a clamp. Allow the plumbline to naturally hang downwards. Once the plumbline has stopped moving, accurately draw a line following it. Do this multiple times on different points of the shape. Wherever all the lines meet is the centre of mass.
What is resultant force
The single sum of all the forces
