EQ

Question 1

linking average speed, distance and time

Answer 1

average speed = distance moved/ time taken

Question 2

linking acceleration, change in speed, time

Answer 2

acceleration = change in velocity/time taken

Question 3

force, mass, acceleration

Answer 3

F = m x a

Question 4

weight, mass, gravitational field strength

Answer 4

W = m x g

Question 5

moment, force, perpendicular distance from pivot

Answer 5

moment = force x perpendicular distance from pivot

Question 6

power, current, voltage

Answer 6

P = I x V

Question 7

energy transferred, current, voltage, time

Answer 7

E = I x V x t

Question 8

Voltage, current, resistance

Answer 8

V = I x R

Question 9

Charge, current, time

Answer 9

Q = I x t

Question 10

Energy transferred, charge, voltage

Answer 10

E = Q x V

Question 11

Wave speed, frequency, wavelength

Answer 11

𝑣 = 𝑓 × λ

Question 12

frequency, time period

Answer 12

f = 1/t

Question 13

refractive index, angle of incidence, angle of refraction

Answer 13

n = sin(i)/sin(r)

Question 14

critical angle, refractive index

Answer 14

sin(c) = 1/n

Question 15

Efficiency, useful energy output, total energy output

Answer 15

Efficiency = (useful energy output / total energy output) × 100%

Question 16

Work done, force, distance moved

Answer 16

W = F x d

Question 17

gravitational potential energy, mass, gravitational field strength, height

Answer 17

GPE = m x g x h

Question 18

Kinetic energy, mass, speed^2

Answer 18

𝑘𝑖𝑛𝑒𝑡𝑖𝑐 𝑒𝑛𝑒𝑟𝑔𝑦 = ½ × 𝑚𝑎𝑠𝑠 × 𝑠𝑝𝑒𝑒𝑑^2

Question 19

power, work done, time taken

Answer 19

P = W/t

Question 20

density, mass, volume

Answer 20

ρ = m/V

Question 21

Pressure, force, area

Answer 21

P = F/A

Question 22

pressure difference, height, density, gravitational field strength

Answer 22

p = h x ρ x g

Question 23

pressure, kelvin temperature of a fixed mass of gas at a constant volume

Answer 23

p1/ T1 = p2/T2

Question 24

pressure, volume of a fixed mass of a gas at constant temperature

Answer 24

p1V1 = p2V2

Question 25

input (primary), output(secondary) voltages and the turns ratio for a transformer

Answer 25

input (primary) voltage / output (secondary) voltage = primary turns / secondary turns

Question 26

input power, output power

Answer 26

𝑽𝒑𝑰𝑷 = 𝑽𝒔𝑰𝒔 for 100% efficiency

Question 27

orbital speed =

Answer 27

v = (2 x π x r) / t

Question 28

change in wavelength, wavelength, velocity of a galaxy and the speed of light

Answer 28

change in wavelength / wavelength of reference galaxy = velocity of galaxy / speed of light