Key Equasioms Flashcards
1
Q
Acceleration
A
a = v - u / t
Acceleration (m/s ^2 )= final velocity (m/s) - initial velocity (m/s) / time(s)
2
Q
Force
A
F = m x a
Force (N) = mass (kg) x acceleration (m/s^2)
3
Q
Weight
A
W = m x g
Weight (N) = mass (kg) x gravitational field strength ( N/kg)
4
Q
Gravitational potential energy
A
GPE = m x g x h
GPE = mass (kg) x gravitational field strength (N/kg) x height (m)
5
Q
Efficiency
A
Efficiency = useful energy out / total energy in
6
Q
Kinetic energy
A
Ke = 1/2 x m x v^2
Kinetic energy (J) = half x mass (kg) x velocity squared (m/s)
7
Q
Momentum
A
P = m x v
Momentum = mass (kg) x velocity (m/s)
8
Q
Wave velocity
A
V = frequency (Hz) x wavelength (m)
9
Q
Velocity/ speed
A
Distance (m)/ time(s)
10
Q
Distance travelled
A
Distance travelled = averaged speed(m/s) x time(s)
