Equations

Question 1

Gravitational Potential Energy (J)

Answer 1

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

Question 3

Elastic potential energy (J)

Answer 3

1/2 x spring constant (N/m) x extension (m)

Question 4

Change in thermal energy (J)

Answer 4

Mass (kg) x specific heat capacity (J/kgC) x temperature change (C)

Question 5

1.) Power (W)

Answer 5

Energy transferred (J)/ Time (s)

Question 6

2.) Power (W)

Answer 6

Work done (J)/ Time (s)

Question 7

Charge flow (coulombs, C)

Answer 7

Current (A) x Time (s)

Question 8

Potential difference (V)

Answer 8

Current (A) x resistance (ohms)

Question 9

Energy transferred ((J)

Answer 9

Charge flow (C) x potential difference (V)

Question 10

3.) Power (W)

Answer 10

Potential difference (V) x Current (A)

Question 11

Density

Answer 11

Mass/Volume

Question 12

Energy (E)

Answer 12

Mass (m) x Specific latent heat (L)

Question 13

Weight (N)

Answer 13

Mass (kg) x Gravitational field strength (N/kg)

Question 14

Work done (J)

Answer 14

Force (N) x distance (m)

Question 15

Force (N)

Answer 15

Spring (N/m) x Extension (m)

Question 16

Distance travelled (m)

Answer 16

Speed (m/s) x Time (s)

Question 17

Acceleration (m/s2)

Answer 17

Change in velocity (m/s)/ Time (s)

Question 18

Final velocity (m/s)

Answer 18

Final velocity - initial velocity2 (m/s) = 2 x acceleration (m/s2) x distance (m)

Question 19

Resultant Force (N)

Answer 19

Acceleration (m/s2) x mass (kg)

Question 20

Momentum (kg m/s)

Answer 20

Mass (kg) x velocity (m/s)

Question 21

Period (s)

Answer 21

1/ frequency (Hz)

Question 22

Wave speed (m/s)

Answer 22

Frequency (Hz) x wavelength (m)

Question 23

Kinetic energy (J)

Answer 23

Kinetic energy = 1/2 x mass(kg) x (speed)2 (m/s)2

Question 24

4.) Power

Answer 24

Current2 x resistance