Equations

Question 1

Equation for work done

Answer 1

Work done (J)
= force (N) x distance (m)

Question 2

Equation for work done

Answer 2

Work done (J)
= Power (W) / Time (s)

Question 3

Equation for wave speed

Answer 3

Wave speed (m/s) =
Frequency (Hz) x wavelength (m)

Question 4

Equation for momentum

Answer 4

Momentum (kg m/s)
= mass (Kg) x velocity (m/s)

Question 5

Equation for resultant force

Answer 5

Resultant force (N) = mass (Kg) x acceleration (m/s/s)

Question 6

Equation for period

Answer 6

Period (s) = 1 / frequency (Hz)

Question 7

equation for acceleration

Answer 7

Acceleration (m/s/s) =
change in velocity (m/s) / time taken (s)

Question 8

Equation for uniform acceleration

Answer 8

(Final velocity) ² - (initial velocity)²
=2 x acceleration x distance

Question 9

The unit for final and initial velocity?

Answer 9

M/s

Question 10

The unit for acceleration?

Answer 10

M/s ²

Question 11

The unit for distance?

Answer 11

m

Question 12

Equation for distance travelled?

Answer 12

Distance travelled (m) =
Speed (m/s) x time (s)

Question 13

Equation for force?

Answer 13

Force (N) = spring constant (N/m) x extension (m)

Question 14

Equation for elastic potential energy?

Answer 14

Elastic potential energy (J) = 0.5 x spring constant (N/m) x (extension) ² (m)

Question 15

Equation for weight?

Answer 15

Weight (N) = mass (kg) x gravitational field strength (N/kg)

Question 16

Equation for energy for a change in state?

Answer 16

Energy for a change in state (J) = mass (kg) x specific latent heat (J/kg)

Question 17

Equation for change in thermal energy?

Answer 17

Change in thermal energy (J) = mass (kg) x specific heat capacity (J/kg) x temperature change (°C)

Question 18

Equation for density?

Answer 18

Density (kg/m ³) = mass (kg) / volume (m ³)

Question 19

What is the equation for pressure

Answer 19

Pressure (P, pascals) = force normal force to that surface (F, newtons) / area of that surface (A, square metres)

Question 20

Equation for period?

Answer 20

1 / frequency

Question 21

Equation for frequency

Answer 21

1 / period

Question 22

Equation for wave speed

Answer 22

Wave speed ( v, metres per second) = frequency (f, Hertz) x wavelength (λ, metres)

Question 23

How many joules Is a newton metre

Answer 23

1 joule is equal to one newton metre

Question 24

How many millisieverts (mSv) are equal to 1 sievert (Sv)

Answer 24

1000 millisieverts