Formulas Flashcards
1
Q
Efficiency
A
Efficiency = useful energy output ÷ total energy input X 100(if want a percentage)
2
Q
Kinetic energy
A
Kinetic energy = 0.5 X mass X velocity^2
3
Q
GPE
A
GPE = maths X gravity X height
Change in gravitational potential = mass X GFS X changing vertical height
4
Q
Average speed
A
Average speed = distance ÷ time
5
Q
Final speed
A
Final speed = starting velocity + acceleration Xtime
6
Q
Final speed^2
A
Final speed^2 = starting velocity^2 + 2 acceleration Xdistance
7
Q
Force
A
Force = mass X acceleration
Newton’s second law
8
Q
Weight
A
Weight = mass X gravity
9
Q
Momentum
A
Momentum = mass X velocity
10
Q
Force (velocity)
A
Force = mass X (final velocity – starting velocity) ÷ Time
11
Q
Wave speed
A
WaveSpeed = frequency X wavelength
Wave speed = distance ÷ Time
12
Q
Power
A
Power = energy ÷ time
