# Equations

What equation links mass, weight and gravitational field strength?
Weight W (N) = Mass m (kg) x Gravitational field strength g (N/kg)
1 of 22
Work done, distance and force?
work done W (J) = force F (N) x distance s (m)
2 of 22
extension, force and constant
force F (N) = constant k (N/m) x extension e (m)
3 of 22
speed, distance travelled and time
distance travelled s (m) = speed v (m/s) x time t (s)
4 of 22
change in velocity, acceleration and time taken
acceleration a (m/s2) = change in velocity delta v (m/s) x time taken t (s)
5 of 22
acceleration, mass and force
force F (N) = mass m (kg) x acceleration a (m/s2)
6 of 22
mass, momentum and velocity
momentum p (kgm/s) = mass m (kg) x velocity v (m/s)
7 of 22
kinetic energy, (speed)2 and mass
Kinetic energy Ek (J) = 1/2 x mass m (kg) x (speed)2 v2 (m/s)
8 of 22
mass, gravitational potential energy, height and gravitational field strength
gravitational potential energy Ep (J) = mass m (kg) x gravitational field strength g (N/kg) x height h (m)
9 of 22
energy transferred, time and power
energy transferred E (kw) = power p (kWh) x time t (h)
10 of 22
work done, time and power
power p (W) = work done W (J) / time t (s)
11 of 22
efficiency, total input energy transfer and total output energy transfer
efficiency (%) = total output energy transfer (J) / total input energy transfer (J)
12 of 22
efficiency, total power output and useful power output
efficiency (%) = useful power output (J)/ total power output (J)
13 of 22
frequency, wavelength and wave speed
wave speed v (m/s) = frequency f (hz) x wavelength (m)
14 of 22
current, time and charge flow
charge flow Q (C) = current I (A) x time t (s)
15 of 22
potential difference, resistance and current
potential difference v (v) = current I (A) x resistance R ( )
16 of 22
resistance, potential difference and current
power P (W) = potential difference V (V) x current I (A)
17 of 22
power , current and resistance
power p (W) = (current)2 I2 (A) x resistance R ( )
18 of 22
power, time and energy transferred
energy transferred E (kWh) = power P (W) x time t (h)
19 of 22
charge flow, energy transferred and potential difference
energy transferred E (J) = charge flow Q (C) x potential difference V (V)
20 of 22
volume, mass and density
density p (kg/m3) = mass m (kg) / volume V (m3)
21 of 22
magnification, image size and size of real object
magnification = size of image/ size of real object
22 of 22

## Other cards in this set

### Card 2

#### Front

Work done, distance and force?

#### Back

work done W (J) = force F (N) x distance s (m)

### Card 3

#### Front

extension, force and constant

### Card 4

#### Front

speed, distance travelled and time

### Card 5

#### Front

change in velocity, acceleration and time taken

## Similar Science resources:

See all Science resources »See all equations resources »