May Test Flashcards
(17 cards)
Speed
Distance / time
Acceleration
(V-U) / Time
Velocity
Distance / time
Momentum
Mass x velocity
Force
Change in momentum / time
Newtons 3rd Law
If A exerts a force on B, then B exerts an equal but opposite force on A
Why are car safety features good
They increase the time it takes to change momentum
Frequency
Velocity / wavelength
Oscillation
Vibration
Frequency
1 / time
Diffraction
Spreading out of waves when they pass through a gap
Efficiency
Useful energy / total energy
Distance travelled
Speed x time
Resultant force
Mass x acceleration
Newtons 1st Law
An object will remain stopped unless an unbalanced force acts upon it
Weight
Mss x gravitational field strength
Gradient
Change in vertical / change in horizontal