Euqations Flashcards
1
Q
Weight
A
Mass x gravitational field strength
2
Q
Work done
A
Force x distance
3
Q
Distance travelled
A
Speed x time
4
Q
Acceleration
A
Change in velocity/time taken
5
Q
Resultant force
A
Mass x acceleration (F=ma)
6
Q
Momentum
A
Mass x velocity
7
Q
Kinetic energy
A
0.5 x mass x (speed)^2
8
Q
Force applied to a spring
A
Force applied to a spring = spring constant x extension
9
Q
Gravitational potential energy
A
Gravitational potential energy = mass x gravitational field strength (g) x height
10
Q
Power
A
Power = energy transferred/time
P = E/t
11
Q
Power
A
Power = work done/time
P = W/t
12
Q
Efficiency
A
Efficiency = useful output energy transfer/total input energy transfer
13
Q
Efficiency
A
Efficiency = useful power output/total power input
14
Q
Wave speed
A
Wave speed = frequency x wavelength
15
Q
Charge flow
A
Charge flow = current x time
