Physics Equations

Question 1

Kinetic Energy Equation =

Answer 1

1/2 x mass x speed^2

Ek=1/2mv^2

Question 2

Gravitational Potential Energy =

Answer 2

mass x gravitational field strength x height

Ep=mgh

Question 3

Efficiency =

Answer 3

useful energy output/total energy input

useful power output/total power input

Question 4

Charge Flow =

Answer 4

current x time

Q=I t

Question 5

Potential Difference =

Answer 5

current x resistance

V=I R

Question 6

Total Resistance =

Answer 6

resistance of component 1 + resistance of component 2

Rt=R1+R2

Question 7

Power =

Answer 7

current x potential difference

P=I V

Question 8

Energy Transferred =

Answer 8

charge flow x potential difference

E=QV

Question 9

Power (2) =

Answer 9

(current)^2 x resistance

P= I^2 R

Question 10

Energy Transferred (2) =

Answer 10

power x time

E=Pt

Question 11

Density =

Answer 11

mass/volume

p=m/v

Question 12

Wave Speed =

Answer 12

frequency x wavelength

v=f 𝜆

Question 13

Weight =

Answer 13

mass x gravitational field strength

W=m g

Question 14

Work Done =

Answer 14

force x distance

W=Fs

Question 15

Force (springs) =

Answer 15

spring constant x extension

F=ke

Question 16

Moment of a Force =

Answer 16

force x distance

M=Fd

Question 17

Pressure =

Answer 17

force normal to a surface/area of that surface

p=F/A

Question 18

Distance Travelled =

Answer 18

speed x time

s=vt

Question 19

Acceleration =

Answer 19

Change in velocity/time taken
OR
final velocity - initial velocity/time taken

a=∆v/t
OR
a=v-u/t

Question 20

Resultant Force =

Answer 20

mass x acceleration

F=ma