Equations

Question 1

Kinetic Energy (J)=

Answer 1

0.5 x mass(kg) x velocity^2 (m/s)

Question 2

Acceleration (m/s^2)=

Answer 2

Velocity Change (m/s) / time (secs)

Question 3

Grav Potential Energy (J)=

Answer 3

Gravitational Field Strength (N/Kg) x Mass (Kg) x height (M)

Question 4

Momentum (kgm/s)=

Answer 4

Mass (kg) x Velocity (m/s)

Question 5

Resultant Force (N)=

Answer 5

mass (kg) x acceleration (m/s^2)

Question 6

Weight (N)

Answer 6

mass (kg) x gravitational field strength (n/kg)

Question 7

Distance =

Answer 7

Speed / time

Question 8

Efficiency (0-1)=

Answer 8

Useful Output (J or W) / Total Input (J or W)

Question 9

Charge (coulombs)=

Answer 9

Current (amps) x time (secs)

Question 10

Energy, charge, potential difference

Answer 10

Energy (J)= Charge (coulombs) x potential difference (volts)

Question 11

Voltage/ Potential Difference (Volts) =

Answer 11

Current (Amps) x resistance

Question 12

Power, Current, Resistance

Answer 12

Power (watts) = current^2 (amps) x resistance

Question 13

Power, voltage, current

Answer 13

Power (watts) = voltage (volts) x current (amps)

Question 14

Power, energy, time

Answer 14

Power (watts) = energy (J) / time (secs)

Question 15

Power, work done, time

Answer 15

Power (watts) = work done (J) / time (secs)

Question 16

Wave speed, frequency, wavelength

Answer 16

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

Question 17

Density (kg/m^3)=

Answer 17

Mass (kg) / Volume (M^3)

Question 18

Force of spring (N)=

Answer 18

Spring constant x extension (m)

Question 19

Work Done (J) =

Answer 19

Force (N) x distance (M)

Question 20

Energy, power, time

Answer 20

Energy (J)= power (watts) x time (secs)

Question 21

Pressure=

Answer 21

Force / Area

Question 22

Wave speed, Wavelength, Period

Answer 22

Wave Speed (m/s) = wavelength (m) / period (1/frequency)

Question 23

Elastic potential=

Answer 23

0.5 x spring constant x extension(^2)