Key Equasioms

Question 1

Acceleration

Answer 1

a = v - u / t

Acceleration (m/s ^2 )= final velocity (m/s) - initial velocity (m/s) / time(s)

Question 2

Force

Answer 2

F = m x a
Force (N) = mass (kg) x acceleration (m/s^2)

Question 3

Weight

Answer 3

W = m x g
Weight (N) = mass (kg) x gravitational field strength ( N/kg)

Question 4

Gravitational potential energy

Answer 4

GPE = m x g x h
GPE = mass (kg) x gravitational field strength (N/kg) x height (m)

Question 5

Efficiency

Answer 5

Efficiency = useful energy out / total energy in

Question 6

Kinetic energy

Answer 6

Ke = 1/2 x m x v^2
Kinetic energy (J) = half x mass (kg) x velocity squared (m/s)

Question 7

Momentum

Answer 7

P = m x v
Momentum = mass (kg) x velocity (m/s)

Question 8

Wave velocity

Answer 8

V = frequency (Hz) x wavelength (m)

Question 9

Velocity/ speed

Answer 9

Distance (m)/ time(s)

Question 10

Distance travelled

Answer 10

Distance travelled = averaged speed(m/s) x time(s)