equations

Question 1

work done

Answer 1

Wd= Fd

Question 2

Gravitational potential energy

Answer 2

gpe= mgh

Question 3

kinnetic

Answer 3

K=½mv²

Question 4

elastic

Answer 4

E=½ke²

Question 5

power

Answer 5

P=E/t

Question 6

force

Answer 6

force=mass x acceleration
f=m×a
N= Kg x m/s²

Question 7

efficiency

Answer 7

Useful power output ÷ total power input x 100

Question 8

hookes law

Answer 8

f=ke

Question 9

speed

Answer 9

s=d/t

Question 10

acceleration

Answer 10

a=v-u/t

Question 11

potential difference

Answer 11

V=IR

Question 12

for parallel circuits, potential difference is…

Answer 12

V1=V2=……
(constant)

Question 13

for parallel circuits, current is…

Answer 13

I total = I1 + I2 + …
(sum of components)

Question 14

for series circuit, current is…

Answer 14

I1=I2=…..
(constant)

Question 15

for series circuits, potential difference is…

Answer 15

Vtotal = V1 + V2 + …
(sum of components)

Question 16

current

Answer 16

I= Q/t

Question 17

density

Answer 17

density = mass/volume

Question 18

pressure

Answer 18

pressure = force/area

Question 19

celcius to kelvin

Answer 19

+273

Question 20

pressure difference

Answer 20

density x gravity x height

Question 21

boyle’s law

Answer 21

p1 x v1 = p2 x v2

Question 22

pressure law

Answer 22

p1/t1 = p2/t2

Question 23

specific heat capacity

Answer 23

energy = mass x specific heat capacity x change in temp
(e=mcΔt)

Question 24

specific latent heat

Answer 24

E=mL
energy = mass x latent heat

Question 25

wave speed

Answer 25

V = λ x f

Question 26

wave frequency

Answer 26

f = 1/ time period