Physics Equations

Question 1

Equation for Speed (m/s)

Answer 1

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

Question 2

Equation for Acceleration (m/s)2

Answer 2

Acceleration (m/s)2 = Final Velocity (m/s) - Initial Velocity (m/s) / Time (s)

Question 3

Equation for Force (N)

Answer 3

Force (N) = Mass (kg) x acceleration (m/s)2

Question 4

Equation for Weight (N)

Answer 4

Weight (N) = mass (kg) x gravitational field strength (N/kg)

Question 5

Equation for Gravitational Potential Energy (J)

Answer 5

GPE (j) = Mass (kg) x gravitational field strength (N/kg) x height (m)

Question 6

Equation for Kinetic Energy (J)

Answer 6

KE (J) = 0.5 x mass x velocity2

Question 7

Equation for Efficiency (J)

Answer 7

Efficiency (J) = useful energy out/ total energy in

Question 8

Equation for Momentum (kg/m/s)

Answer 8

Momentum (Kg/m/s) = mass (kg) x velocity (m/s)

Question 9

Equation for Wave Velocity (m/s)

Answer 9

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

Question 10

Equation for Work done (J)

Answer 10

Work done (J) = force (N) x distance in force direction (M)

Question 11

Equation for Power (W)

Answer 11

Power (W) = Energy Transferred (J) / time (s)

Question 12

Equation for moment (Nm)

Answer 12

Moment (Nm) = force (N) x distance normal to the direction of the force (M)

Question 13

Equation for Energy Transferred (J)

Answer 13

Energy Transferred (J) = Charge (C) x Potential Difference (V)

Question 14

Equation for Potential Difference (V)

Answer 14

Potential Difference (V) = Current (A) x Resistance (Ohms)

Question 15

Equation for Power (W) (current & pd)

Answer 15

Power (W) = current (A) x Potential Difference (V)

Question 16

Equation for Power (W) (current & resistance)

Answer 16

Power (W) = current2 (A) x resistance (Ohms)

Question 17

Equation for Charge (C)

Answer 17

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

Question 18

Equation for Densty (kg/m3)

Answer 18

Density (kg/m3) = mass (kg) / Volume (m3)

Question 19

Equation for Pressure (N/M2)

Answer 19

Pressure (n/m2) = force (N) / Area (m2)

Question 20

Equation for Force (using spring constant)

Answer 20

Force (N) = spring constant (N/M) x extension (M)