Formulas for Test Flashcards
Distance travelled = ?
Using speed
Average speed x time
D
S T
Average speed = ?
Distance / time
D
S T
Time taken = ?
Using speed
Distance travelled / average speed
D
S T
Acceleration = ?
Using velocity
Change in velocity / time taken
a = (v-u)
——
t
Acceleration = ?
Using force
Force / mass
F
M A
Force = ?
Using acceleration
Mass x acceleration
F
M A
Mass = ?
Using force
Force / acceleration
F
M A
Weight = ?
Mass x gravitational field strength
W
M G
Mass = ?
Using weight
Weight / gravitational field strength
W
M G
Gravitational field strength =?
Using weight
Weight / mass
W
M G
Momentum =?
using velocity
Mass x velocity
P
M V
Mass = ?
Using momentum
Momentum / velocity
P
M V
Velocity =?
Using momentum
Momentum / mass
P
M V
Change in gravitational potential energy = ?
Mass x gravitational field strength x change in vertical height
ΔGPE = m x g x Δh
Kinetic energy = ?
½ x mass x (speed squared)
½ x m x v²
Efficiency = ?
(Useful energy transferred by the device)
——————————————————
(Total energy supplied to the device)
all x 100% to give the answer as a percentage
Wave speed =?
Using wavelength
Frequency x wavelength
V
f λ
Frequency of waves =?
Wave speed / wavelength
V
f λ
Wavelength =?
Wave speed / frequency
V
f λ
Wave speed =?
Using distance
Distance / time
D
V t
Distance =?
Using wave speed
Wave speed x time
D
V t
Time =?
Using wave speed
Distance / wave speed
D
V t
Change in velocity =?
Acceleration x time taken
a = (v-u)
——
t
Time taken =?
Using acceleration
Change in velocity / acceleration
a = (v-u)
——
t
Work done =?
Using force
Force x distance
Work done
F D
Force =?
Using work done
Work done / distance
Work done
F D
Distance =?
Using work done
Work done / force
Work done
F D
Power =?
using work done
Work done / time taken
Work done
Power t
Work done =?
Using power
Power x time taken
Work done
Power t
Time taken =?
Using work done
Work done / power
Work done
Power t
Resistance =?
using voltage
Voltage / current
V
I R
Voltage =?
current x resistance
V
I R
Current =?
using voltage
Voltage / resistance
V
I R
What units must displacement always be in?
m
What units must velocity always be in?
m/s