physics Flashcards
1
Q
acceleration
A
change in velocity/time taken(m/s^2)
2
Q
acceleration of freefall
A
gradient/2
3
Q
change in pressure
A
density x acceleration due to gravity x depth
4
Q
kelvin to celsius
A
K= 0(c) + 273
5
Q
density
A
mass/volume
6
Q
efficiency
A
useful energy output/ total energy input
7
Q
energy transferred
A
current x p.d x time
8
Q
kinetic energy
A
1/2 x mass x velocity^2
9
Q
gravitational potential energy
A
mass x gravity x height
10
Q
impulse
A
force x time force acts or ft=m(v-u)
11
Q
moment
A
distance x force
12
Q
momentum
A
mass x velocity
13
Q
percentage effieceny
A
useful output/total input x 100
14
Q
power
A
workdone/time or energy transfered/time or current x p.d
15
Q
power loss
A
current^2 x resistance
