EQUATIONS needed for mocks

Question 1

UNIT 1: what are the 2 energy equations for the energy unit?

Answer 1

-Ek = 0.5 x m x v( squared)
( kinetic energy = 0.5 x mass x velocity squared)
-Ep = m x g x h
(GPE = mass x height x gravtitational field strenght (10n on earth)

Question 2

UNIT 1: what are the 2 power equations for the energy unit?

Answer 2

-P= E/ T
(Power = energy divided by time)
-P= W/T
(power = work done divided by time)

Question 3

UNIT 2: what are the 2 energy equations for the electricity unit?

Answer 3

-E = I x T X V
( energy= current x time x volts/potential difference)
-E = Q x V
(energy = charge x potential difference)

Question 3

UNIT 1: what are the 2 random equations for the energy unit?

Answer 3

-Efficiency= useful output/ total input
-W = F X D
( work done = force x distance)

Question 4

UNIT 2: what are the 2 power equations for the electricity unit?

Answer 4

-P= I(squared) x R
(power x current(squared) X resistance)
-P= V x I
( power= potential difference x current)

Question 5

UNIT 2: What are the 3 random equations for the electricity unit?

Answer 5

• Rt = R1 + R2 +…
  -Q = I x t
  (charge = current x time)
  -V = I x R
  (potential difference = current x resistance)

Question 6

UNIT 3: What is the equation for density

Answer 6

Density = mass/ volume