FORMULAS Flashcards
1
Q
Weight
A
mass x gravitational field strength W=mg
2
Q
Work done
A
force x distance W = Fs
3
Q
Force applied to a spring
A
spring constant x extension F=ke
4
Q
moment of a force
A
force x distance M = Fd
5
Q
Pressure
A
force / area p= F/A
6
Q
distance
A
speed x time s= vt
7
Q
acceleration
A
change in velocity/ time
a = triangle v/ t
8
Q
Resulatant force
A
mass x acceleration F=ma
9
Q
momentum
A
mass x velocity p= m v
10
Q
kinetic energy
A
0.5 x mass x speed^2
0.5 mv^2
11
Q
gravitational potential energy
A
mass x gravitational field strength x height
Ep= mgh
12
Q
Efficiency 1
A
useful output energy transfer/ total input energy transfer
13
Q
Efficiency 2
A
useful power output/ total power input
14
Q
Wave speed
A
frequency x wavelength
v= f lamda
15
Q
charge flow
A
current x time
Q= I t
