eq from spec

Question 1

eq for speed

Answer 1

av speed = distance ÷ time

Question 2

eq for acceleration

Answer 2

acceleration = change in velocity ÷ time

Question 3

eq for force (mass and acceleration)

Answer 3

force = mass x acceleration

Question 4

eq for momentum *

Answer 4

momentum = mass x velocity

Question 5

eq for density

Answer 5

density = mass ÷ volume

Question 6

eq for work

Answer 6

work = force x distance

Question 7

what is energy transferred known as

Answer 7

work done

Question 8

eq for kinetic energy

Answer 8

kinetic energy = 1/2mass x speed2

Question 9

eq for gpe

Answer 9

gpe = mass x g x height

Question 10

eq for weight

Answer 10

weight = mass x g

Question 11

eq for pressure

Answer 11

pressure = force ÷ area

Question 12

eq for moment

Answer 12

moment = force x perp distance from pivot

Question 13

eq for voltage

Answer 13

voltage = current x resistance

Question 14

eq for charge

Answer 14

charge = current x time

Question 15

eq for electric power

Answer 15

power = voltage x current

Question 16

eq for wave speed

Answer 16

wave speed = frequency x wavelength

Question 17

eq for refractive index

Answer 17

n = sini ÷ sinr

Question 18

eq for critical angle

Answer 18

sinc = 1 ÷ n

Question 19

eq for efficiency

Answer 19

efficiency = useful energy output ÷ total energy output

Question 20

eq for pressure difference

Answer 20

pressure difference = height x density x g

Question 21

input power and output power eq

Answer 21

VpIp = VsIs

Question 22

eq with voltage and turns

Answer 22

input voltage primary turns
——————- = ——————
output voltage secondary turns