Physics Gcse Equations

Question 1

weight= mass x gravitational field strength

Answer 1

W=mg

Question 2

force applied to a spring= spring constantx extension

Answer 2

F=ke

Question 3

acceleration= change in velocity/ time taken

Answer 3

a=(change in) v/t

Question 4

momentum= mass x velocity

Answer 4

p=mv

Question 5

gravitational potential energy= mass x gravitational field strength x height

Answer 5

E(p) = mxgxh

Question 6

power= work done/ time

Answer 6

P=W/t

Question 7

efficiency= useful power output/total power input

Question 8

charge flow= current x time

Answer 8

Q=It

Question 9

power= potential difference x current

Answer 9

P=VI

Question 10

energy transferred= power x time

Answer 10

s=vt

Question 11

resultant force= mass x acceleration

Answer 11

F=ma

Question 12

kinetic energy= 0.5x mass x (speed)^2

Answer 12

E(k)= 1/2 x m x (v)^2

Question 13

power= energy transferred/ time

Answer 13

P = E/t

Question 14

efficiency= useful output energy transfer/ total input energy transfer

Question 15

potential difference= current x resistance

Answer 15

W=IxR

Question 16

Power= (current) ^2 x resistance

Answer 16

P= (I)^2 x R

Question 17

energy transferred= charge flow x potential difference

Answer 17

E= QV

Question 18

(final velocity) ^2- (initial velocity)^2=2xaccelreation x distance

Answer 18

v^2-u^2=2as

Question 19

elastic potential energy= 0.5x spring constant x extension^2

Answer 19

E(e)=1/2 x k x e^2

Question 20

period=1/frequency