Physics Equations

Question 1

Distanced travelled

Answer 1

Speed x time

Question 2

Acceleration

Answer 2

change in velocity/ time {a= v-u/t}

Question 3

force

Answer 3

Mass x acceleration {f=ma}

Question 4

weight

Answer 4

mass x gravitational field strength {w= mg}

Question 5

efficiency

Answer 5

useful/total

Question 6

momentum

Answer 6

mass x velocity {p=mv}

Question 7

wave speed

Answer 7

frequency x wavelength {v=fλ)

Question 8

wave speed 1

Answer 8

distance/time {v= 𝑥/t}

Question 9

density

Answer 9

mass/volume {ρ=m/V}

Question 10

work done

Answer 10

force x distance moved in direction of force

{E= Fd}

Question 11

Change in GPE

Answer 11

Mass x gfs x change in height

{ΔGPE= mgΔh}

Question 12

Kinetic energy

Answer 12

1/2x mass x speed²

{KE=1/2mv²}

Question 13

Power 2

Answer 13

work done/ time

{P= E/t}

Question 14

Energy transferred

Answer 14

charge moved x potential difference

{E= QV}

Question 15

Charge

Answer 15

current x Time {It}

Question 16

Potential difference

Answer 16

current x resistance {V= IR}

Question 17

power

Answer 17

energy transferred/ time taken

{P= E/t}

Question 18

electrical power

Answer 18

current x potential difference

{P=IV}

Question 19

electrical power 2

Answer 19

current² x resistance

{P= I²R}

Question 20

force exerted on a spring

Answer 20

spring constant x extension

{F= k𝑥}

Question 21

moment of a force

Answer 21

force x distance normal to direction of force

Question 22

pressure

Answer 22

force normal to surface/ area of surface

{P= F/A}