Formula To Learn

Question 1

Power

Answer 1

Work done / time taken

J). (S

Question 2

Work done

Answer 2

Force x distance

N). (M

Question 3

Speed

Answer 3

Distance / time

Question 4

Vector quantities

Answer 4

Have both a size, magnitude and direction

Question 5

Scalar quantities

Answer 5

Only have a magnitude

Question 6

Physical quantities

Answer 6

Length velocity area energy

Weight speed

Question 7

Gravitational potential energy

Answer 7

Mass x gravitational field strength x height

Question 8

Kinetic energy

Answer 8

1/2 x mass x velocity2 (squared)

Question 9

Weight

Answer 9

Mass x gravitational field strength

Question 10

Momentum

Answer 10

Mass x velocity

Kg). (M/s

Question 11

Change in momentum

Answer 11

Force x time

Question 12

Efficiency

Answer 12

Useful energy transferred / total energy supplied

Question 13

Acceleration

Answer 13

Change in velocity / time taken

A = (v-u)
T

Question 14

Distance travelled

Answer 14

Average speed x time

Question 15

Force

Answer 15

Mass x acceleration

Question 16

Wave speed

Answer 16

Frequency x wavelength

Question 17

Wave speed

Answer 17

Distance / time

Question 18

Energy transferred

Answer 18

Change moved x potential difference

Question 19

Charge

Answer 19

Current x resistance

Question 20

Potential difference

Answer 20

Current x resistance

Question 21

Power

Answer 21

Energy transferred (J) / time taken

Question 22

Electrical power

Answer 22

Current x potential difference

Question 23

Electrical power

Answer 23

(Current)2 x resistance

Question 24

Force exerted on a spring

Answer 24

Spring constant x extension

Question 25

Density

Answer 25

Mass / volume

Question 26

Force

Answer 26

Change in momentum / time

Question 27

Change in thermal energy

Answer 27

Mass x specific heat capacity x change in momentum

Question 28

Thermal energy for a change in state

Answer 28

Mass x specific latent heat

Question 29

Energy transferred in stretching

Answer 29

0.5 x spring constant x (extension)2

Question 30

For transformers with 100% efficiency

Answer 30

Potential difference in primary coil x current in primary coil = potential difference across secondary coil x current in secondary coil

Question 31

Energy transferred

Answer 31

Current x potential difference x time

Question 32

Force on a conductor at right angles to a magnetic field carrying a current

Answer 32

Magnetic flux density x current x length

Question 33

Force

Answer 33

Magnetic field strength x current x length of wire

Question 34

Density

Answer 34

Mass / volume

Question 35

Mass

Answer 35

Volume x density

Question 36

Volume

Answer 36

Mass / density

Question 37

Energy

Answer 37

Energy = mass x specific latent heat

Question 38

Mass

Answer 38

Energy / specific latent heat

Question 39

Specific latent heat

Answer 39

Energy / mass