All Physics Equations

Question 1

Wave speed

Answer 1

Wave speed (m/s) = Frequency (Hz) x Wavelength (m)

Question 2

Energy transferred

Answer 2

Energy transferred (J) = Power (W) x Time (s)
OR
Energy transferred electrically (J) = Voltage (V) x Charge flow (Coulomb)
OR
Energy transferred (J) = Charge (C) x Voltage (V)
OR
Energy transferred (J) = Force (N) x Distance (m)

Question 3

Charge

Answer 3

Charge (C) = Current (A) x Time (s)

Question 4

Voltage

Answer 4

Voltage (V) = Current (A) x Resistance (Ohms)

Question 5

Primary coil voltage, secondary coil voltage, turns on primary coil, turns on secondary coil

Answer 5

Primary voltage (V) / Secondary voltage (V) = turns on primary / turns on secondary

Question 6

Voltage in primary, current in primary, voltage in secondary, current in secondary

Answer 6

Primary voltage x Primary current = Secondary voltage x Secondary current
INPUT = OUTPUT (100% efficent)

Question 7

Power

Answer 7

Power (W) = Voltage (V) x Current (A) OR

Power = (Current)^2 (A) x Resistance (Ohms)

Question 8

Force

Answer 8

Force (N) = Mass (g) x Acceleration (m/s^2)
OR
Force = Magnetic field strength (T) x Current (A) x Length of wire (m)

Question 9

Kinetic energy

Answer 9

Kinetic energy = 0.5 x Mass (g) x (Speed)^2 (m/s)

Question 10

Momentum

Answer 10

Momentum = Mass (g) x Velocity (m/s)

Question 11

Gravitational field strength

Answer 11

Weight = Mass (g) x Gravitation field strength (N)

Question 12

Gravitational potential energy

Answer 12

Gravitational potential energy (J) = Mass (g) x Height (m) x Gravitational field strength (N)

Question 13

Force exerted by a spring

Answer 13

Force exerted by a spring (N) = Extension (m) x Spring constant (m)

Question 14

Moment of a force

Answer 14

Moment of a force = Force (N) x Distance (m)

Question 15

Acceleration

Answer 15

Acceleration (m/s^2) = Change in speed / Time taken (s)

Question 16

Density

Answer 16

Density (kg/m^3) = Mass (kg) / Volume (m^3)

Question 17

Pressure

Answer 17

Pressure (Pascal) = Force to surface (N) / Area of surface (m^2)

Question 18

Final speed^2 - Initial speed^2

Answer 18

Final speed^2 - Initial speed^2 = 2 x Acceleration (m/s^2) x Distance (m)

Question 19

Distance

Answer 19

Distance (m) = Speed (m/s) x Time (s)

Question 20

Change of momentum

Answer 20

Change of momentum (kg m/s) = Resultant force (N) x Time for which it acts (s)

Question 21

Work done

Answer 21

Work done (J) = Force (N) x Distance (m)