equations that you have to learn.

Question 1

energy: kinetic energy.

Answer 1

1/2 ×mass × speed²
Ek=1/2mv².

Question 2

energy: GPE.

Answer 2

mass x gravitational field strength x height.
Ep=mgh.

Question 3

energy: power.

Answer 3

work done/time taken.= energy transferred/ time taken.

P=W/t = E/t.

Question 4

energy: efficiency.

Answer 4

useful energy output/ total energy input.

useful power output/ total power input.

Question 5

electricity: charge flow.

Answer 5

current x time.
Q=It.

Question 6

electricity: potential difference.

Answer 6

current x resistance.
V=IR.

Question 7

electricity: total resistance.

Answer 7

resistance of component 1 + resistance of component 2.

Question 8

electricity: power.

Answer 8

current x potential difference.
P=IV.

Question 9

electricity: (current)² x resistance.

Answer 9

P=I²R.

Question 10

electricity: energy transferred.

Answer 10

power x time.
E=Pt.

Question 11

electricity: energy transferred.

Answer 11

charge flow x potential difference.
E=QV.

Question 12

particle model of matter: density.

Answer 12

mass/ volume.
P=m/V.

Question 13

specific latent heat: specific latent heat of fusion.

Answer 13

energy= specific latent heat of fusion × mass.
E= L × M.

Question 14

momentum.

Answer 14

momentum= mass × velocity.
p=mv.