equations in paper 2 Flashcards
1
Q
how do you calculate work done?
A
work done=
force x distance moved in the direction of the force
2
Q
what are the symbols for the work done formula?
A
E = F x D
3
Q
how do you calculate power?
A
power =
workdone / time
4
Q
what are the symbols for the power formula?
A
E
p=—–
t
5
Q
how do you calculate energy transferred?
A
=charge moved X potential difference
6
Q
how do you calculate charge?
A
charge= current X time
7
Q
how do you calculate potential difference?
A
p.d.=current X resistance
8
Q
how do you calculate power?
A
power = energy transferred(J) / time taken
9
Q
what are the two ways of calculating electrical power?
A
= current X potential difference
= (current)’2X resistance
10
Q
what is the symbol for current?
A
I
11
Q
how do you calculate force exerted on a spring?
A
spring constant X extension
