Flashcards in Physics Equations Deck (31)

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1

## State the relationship between average speed, distance moved and time taken

### average = distance moved / time taken

2

## State the relationship between acceleration, change in velocity and time taken

###
acceleration = change in velocity / time taken

or

a = (v-u) / t

3

## State the relationship between final speed, initial speed, acceleration and distance moved

###
(final speed)² = (initial speed)² + (2 x acceleration x distance moved)

or

v² = u² + (2 x a x s)

4

## State the relationship between force, mass and acceleration

###
Force = mass x acceleration

or

F = ma

5

## State the relationship between weight, mass and g.

###
weight = mass x g

or

W = m x g

6

## State the relationship between momentum, mass and velocity.

###
momentum = mass x velocity

or

p = m x v

7

## State the relationship between force, change in momentum and time taken

###
force = change in momentum / time taken

or

F = (mv-mu)/t

8

## State the relationship between moment, force and perpendicular distance from pivot.

### moment = force x perpendicular distance from pivot

9

## State the relationship between power, current and voltage.

###
power = current x voltage

or

P = I x V

10

## State the relationship between energy transferred, current, voltage and time

###
energy transferred = current x voltage x time

or

E = I x V x t

11

## State the relationship between voltage, current and resistance

###
voltage = current x resistance

or

V = I X R

12

## State the relationship between charge, current and time

###
Charge = current x time

or

Q = I x t

13

## State the relationship between voltage , energy and charge.

###
voltage = energy / charge

or

V = E/Q

14

## State the relationship between wave speed, frequency and wavelength

###
wave speed = frequency x wavelength

or

v = f x λ

15

## State the relationship between frequency and time period.

###
frequency = 1 / time period

or f = 1/T

16

## State the relationship between the refractive index and the angles of incidence and refraction.

### n = sin i / sin r

17

## State the relationship between the critical angle and the refractive index.

### sin c = 1 / n

18

## State the equation for efficiency.

### efficiency = (useful energy output / total energy input) x 100%

19

## State the relationship between work done, force and distance moved.

###
work done = force x distance moved

or

W = F x d

20

## State the relationship between gravitational potential energy, mass, gravitational field strength and height.

###
gravitational potential energy = mass x gravitational field strength x height.

or

GPE = mgh

21

## State the relationship for kinetic energy, mass and speed

###
kinetic energy = 1/2 x mass x speed²

or

KE = 1/2 x m x v²

22

## State the relationship between power, work done and time taken

###
Power = work done / time taken

or

P = W/t

23

## State the relationship between density, mass and volume.

###
density = mass / volume

or

ρ = E/A

24

## State the relationship between pressure difference, height, density and gravitational field strength

###
pressure difference = height x density x gravitational field strength

or

p = h x ρ x g

25

## State the relationship between change in thermal energy, mass, specific heat capacity and change in temperature

###
change in thermal energy = mass x specific heat capacity x change in temperature

or

ΔQ = m x c x ΔT

26

## State the relationship between pressure and temperature.

### p1/T1 = p2/T2

27

## State the relationship between pressure and volume.

### p1V1 = p2V2

28

## State the relationship between input and output voltage; and primary and secondary turns

###
input voltage / output voltage = primary turns / secondary turns

Vp/Vs = np/ns

29

## State the relationship between input power and output power

###
for 100% efficiency:

input power = output power

or

VpIp = VsIs

30