formulas

Question 1

speed

Answer 1

distance / time

Question 2

acceleration

Answer 2

V - U/ time

Question 3

how to find total distance in speed time graph

Answer 3

area under graph

Question 4

weight

Answer 4

mass x gravity

Question 5

density

Answer 5

mass / volume

Question 6

force

Answer 6

mass x acceleration

Question 7

terminal velocity

Answer 7

weight of an object(downward) = air resistance (upwards)

Question 8

hookes law

Answer 8

force = extension x spring constant

Question 9

moment

Answer 9

force x distance from pivot

Question 10

law of moments

Answer 10

total clockwise moment = total anticlockwise moment

Question 11

work

Answer 11

force x distance

Question 12

kinetic energy

Answer 12

1/2 x mass x (v^2)

Question 13

potential energy

Answer 13

mass x gravity x height

Question 14

power

Answer 14

work done/ time taken
energy transfer / time

Question 15

pressure

Answer 15

force / area

Question 16

pressure in liquid

Answer 16

density x gravity x height

Question 17

boyles law

Answer 17

P1V1=P2V2

Question 18

specific heat capacity

Answer 18

energy / mass x change in temperature

Question 19

thermal expansion ( 2 formulas)

Answer 19

mass x specific heat capacity

energy / change in temperature

Question 20

specific latent heat

Answer 20

energy / mass

Question 21

how is heat transferred in different states

Answer 21

solid - conduction
liquids and gas -convection and convection current
vacuum - radiation

Question 22

speed in wave

Answer 22

frequency x wavelength

Question 23

frequency of a wave

Answer 23

1/ time period of wave

Question 24

how to find refractive index(2 formulas)

Answer 24

sin i / sin r
speed of light in air / speed of light in medium

Question 25

the electromagnetic spectrum in order of increasing frequency

Answer 25

radio waves micro waves infrared ultraviolet x rays gamma rays

Question 26

speed of light in air

Answer 26

3 x 10^ 8 m/s

Question 27

current

Answer 27

charge / time

Question 28

ohms law

Answer 28

resistance = Voltage / current

Question 29

voltage

Answer 29

energy / charge

Question 30

Resistance in series

Answer 30

All resistances added up

Question 31

resistance in parallel

Answer 31

1 / all resistance = (1/R1) + (1/R2)

Question 32

potential divider 2 formulas

Answer 32

V1 / V2 = R1/R2 (R2 / R1 + R2) x voltage

Question 33

electrical power( 3 formulas)

Answer 33

current x voltage Current^2 x Resistance voltage^2 / Resistance

Question 34

Transformer number of coils

Answer 34

primary voltage / secondary voltage = primary no of turns / secondary no of turns

Question 35

transformer power 2 formulas

Answer 35

power of primary coil = power of secondary coil Primary voltage / Secondary voltage = current in secondary / current in primary

Question 36

average orbital speed

Answer 36

2 x pi x r / time

Question 37

critical angle

Answer 37

1 / sin(critical angle) = refractive index

Question 38

impulse

Answer 38

force x time change in momentum

Question 39

energy transferred in electricity

Answer 39

current x voltage x time

Question 40

momentum

Answer 40

mass x velocity

Question 41

inelastic collision

Answer 41

initial momentum 1 x initial momentum 2 = (mass 1 + mass 2) x final velocity