Physics Formula

Question 1

Formula for Density

Answer 1

Density = Mass / Volume

Question 2

Formula for Speed

Answer 2

Speed = Distance traveled / Time Taken

Question 3

Formula for Force using acceleration

Answer 3

Force = Mass x Acceleration

Question 4

Formula for Momentum

Answer 4

Momentum = Mass x Velocity

Question 5

Formula for Weight

Answer 5

Weight = Mass x Gravitational force

Question 6

Formula for Moment about a Point

Answer 6

Moment = Force x Perpendicular distance from pivot

Question 7

Formula for Force (load) in Springs

Answer 7

Load = Spring Constant x Extension

Question 8

Formula for Pressure using Area

Answer 8

Pressure = Force / Area

Question 9

Formula for Pressure in Liquids

Answer 9

Pressure = Density x Height x Gravitational force

Question 10

Formula for converting Celsius into Kelvins

Answer 10

Kelvin temp. = Celsius temp. + 273

Question 11

Formula for Compressing gases at a constant temp

Boyle’s Law

Answer 11

Pressure 1 x Volume 1 = Pressure 2 x Volume 2

Question 12

Formula for Work done

Answer 12

Work done = Force x Distance moved in the direction of force

Question 13

Formula for Gravitational Potential Energy

Answer 13

GPE = Mass x Gravitational Force x Height

Question 14

Formula for Kinetic Energy

Answer 14

KE = 1/2 (Mass x (Velocity ^2))

Question 15

Formula for Energy Transferred Using Temperature Change

Answer 15

Energy Transferred = Mass x Specific Heat Capacity x Temperature change

Question 16

Formula for Energy Transferred during State change

Answer 16

Energy Transferred = Mass x Specific Latent Heat

Question 17

Formula for Power using Work Done

Answer 17

Power = Work Done / Time taken

Question 18

Formula for Power using Energy Transformed

Answer 18

Power = Energy Transformed / Time taken

Question 19

Formula for Efficiency using Work

Answer 19

Efficiency = Useful Work Done / Total energy input

Question 20

Formula for Efficiency using Energy Output

Answer 20

Efficiency = Useful Energy Output / Total energy input

Question 21

Formula for Efficiency using Power

Answer 21

Efficiency = Useful Power Output / Total power input

Question 22

Formula for Wave speed

Answer 22

Wave speed = Frequency x Wavelength

Question 23

Formula for Refractive index

Answer 23

Refractive Index = Sin of Incidence angle/ Sin of Refraction angle

Question 24

Formula for Total internal reflection (Critical angle)

Answer 24

Sin of critical angle = 1 / refractive index

Question 25

Formula for Charge

Answer 25

Charge = Current x time

Question 26

Formula for Resistance

Answer 26

Resistance = Voltage (potential difference) / current

Question 27

Formula for Resistance in series

Answer 27

Resistance = Resistance 1 + Resistance 2……

Question 28

Formula for Resistance in parallel

Answer 28

1/Resistance = 1 / Resistance 1 + 1/ resistance 2….

Question 29

Formula for Electrical Power

Answer 29

Power = Voltage x current

Question 30

Formula for Electrical Energy

Answer 30

Energy = Voltage x current x time

Question 31

Formula for Transformers

Answer 31

Output voltage / Input voltage = output turns / input turns

Question 32

Formula for Acceleration

Answer 32

Acceleration = Change in Velocity / Time taken

Question 33

Formula for Force using Momentum

Answer 33

Force = Change in momentum / time

Question 34

Formula for Impulse

Answer 34

Impulse = Force x time = Change in momentum

Question 35

Formula for Useful Power Output using speed

Answer 35

Useful Power Output = Force x speed

Question 36

Formula for Refractive Index using Speed

Answer 36

Refractive index = Speed of light in Vacuum / Speed of light in medium

Question 37

Power Through a Transformer

Answer 37

Input Voltage x Input Current = Output Voltage x Output Current (V1 I1 = V2 I2)

Question 38

Power Loss in Cables

Answer 38

Power Loss= Current^2 x Resistance