Equations Flashcards
1
Q
weight
W
A
mass x gravitational field strength
m x g
2
Q
work done
W
A
force x distance(along line of action of force)
F x s
3
Q
force applied to a spring
F
A
spring constant x extension
k x e
4
Q
moment of a force
M
A
force x distance(normal to direction of force)
F x d
5
Q
pressure
p
A
force normal to a surface/area of the surface
F/A
6
Q
distance travelled
s
A
speed x time
v x t
7
Q
acceleration
a
A
change in velocity/time taken
(v-u)/t
8
Q
resultant force
F
A
mass x acceleration
m x a
9
Q
momentum
p
A
mass x velocity
m x v
10
Q
kinetic energy
Ek
A
- 5 x mass x (velocity)2
0. 5 x m x v2
11
Q
gravitational potential energy
Ep
A
mass x gravitational field strength x height
m x g x h
12
Q
power
P
A
energy transferred/time
E/t
13
Q
power
P
A
work done/time
W/t
14
Q
efficiency
A
useful output energy transfer/total input energy transfer
15
Q
efficiency
A
useful power output/total power input
