1. Equations Motion, Energy and Matter Flashcards
Efficiency
Useful energy / total energy supplied
Change in GPE
Mass x GFS x Change in vertical height
Kinetic energy
1/2 x mass x (speed)²
Speed
Distance / time
Wave speed
Frequency x Wavelength
Period of a wave
1 / Frequency
Resistance
Potential difference / Current
Charge flowing at one time
Current x Time
Energy transferred
Current x Potential difference x Time
Total power
Energy transferred / Time
Gradient
Change in Y (Y2-Y1) / Change in (X2-X1)
Acceleration
Change in velocity / Time
(Final velocity)² x (Initial velocity) ²
2 x Acceleration x Distance
Weight
Mass x GFS (acceleration due to gravity)
Force
Acceleration x Mass
Momentum
Mass x Velocity
Force of momentum
Change in momentum / Time
Stopping distance
Braking distance x Thinking distance
Celcius to Kelvin
Celcius + 273
Velocity
change in displacement / time
SUVAT
Displacement, Initial velocity, Final Velocity, Acceleration, Time
Moment
Force x perpendicular distance
Equillibrium
Total clockwise moments = total anticlockwise moments
Density
Mass / Volume
Momentum
Mass x Velocity
Average resultant force
Change in momentum / TIme
Impulse / Change in momentum
Force x Time
Momentum of photons
Plancks constant / wave length
Energy of photons
Plancks constant x frequency
Work done
Force x Distance moved
Specific heat capacity
Q = m x c x t
Q = heat energy
M = mass
C = capacity
T = temp
Difference between a scalar and a vector quantity
A scalar only has magnitude whereas a vector has both magnitude and direction
What does it mean by instantaneous speed
The speed of an object at that point in time
What does it mean when velocity is constant
Then acceleration equals 0 and forces are opposite and equal
Give examples of scalar quantities
Distance
Time
Density
Pressure
Mass
Temperature
Energy or work
Give examples of vector quantities
Displacement
Velocity
Acceleration
Force
Magnetic field strength
Momentum
What is the centre of gravity
The point at which weight acts upon an object
What does it mean by equillibrium
When the net moments equals 0 and the resultant forces equal 0
Newtons 3rd law
Every action force has an opposite and equal reaction force acting within the same line
Newtons 2nd law
F = m x a
Newtons 1st law
An object will remain at rest or in constant ,motion unless an external force is exerted upon it
What is the different between an elastic and non elastic collision
Elastic= all KE is conserved
Non Elastic= KE is not conserved and is transferred to other forms
What does the area under a force time graph represent
Impulse or the change in momentum
Power equation
Energy transferred / time
Give an example of a type of cake
Red velvet
Carrot
Coffee
