PHYSICS All equations paper 1

Question 1

Kinetic energy = 0.5 x mass x (speed)2

Answer 1

𝐸k = 1/2 𝑚 (𝑣)2

Question 2

Elastic potential energy = 0.5 × spring constant × (extension)2

Answer 2

𝐸e = 1/2 k (e)2

Question 3

Gravitational potential energy = mass × gravitational field strength × height

Answer 3

𝐸p = m g h

Question 4

Change in thermal energy = mass × specific heat capacity × temperature change

Answer 4

ΔE = m c Δθ

Question 5

Power = energy transferred/time

Answer 5

P = E/T

Question 6

Power = work done/time

Answer 6

P = W/T

Question 7

Efficiency = Useful output/total input

Answer 7

Useful/total

Question 8

Efficiency = useful power/total

Answer 8

Useful/total

Question 9

Charge flow = current × time

Answer 9

Q = I t

Question 10

Potential difference = current × resistance

Answer 10

V = I R

Question 11

Power = potential difference × current

Answer 11

P = V I

Question 12

Power = (current)2 × resistance

Answer 12

P = (I)2 R

Question 13

Energy transferred = power × time

Answer 13

E = P t

Question 14

Energy transferred = charge flow × potential difference

Answer 14

E = Q V

Question 15

Density = Mass/volume

Answer 15

P = M/V

Question 16

Thermal energy for a change of state = mass × specific latent heat

Answer 16

E = m L

Question 17

For gases: pressure × volume = constant

Answer 17

p V = constant