PAT

Question 1

Geometric sequence to n

Answer 1

a(1-r^n) / (1-r)

Question 2

Geometric sequence to infinity

Answer 2

a / (1-r)

Question 3

SUVAT (T is unknown)

Answer 3

v^2 = u^2 + 2as

Question 4

SUVAT (A is unknown)

Answer 4

s = t (u+v)/2

Question 5

SUVAT (V is unknown)

Answer 5

s = ut + 1/2 at^2

Question 6

SUVAT (S is unknown)

Answer 6

v = u + at

Question 7

Newton’s first law

Answer 7

an object in motion stays in motion if no unbalanced forces act on it

Question 8

Newton’s second law

Answer 8

F = ma

Question 9

Newton’s third law

Answer 9

When two objects interact, they apply forces to each other of equal magnitude and opposite direction

Question 10

Circular motion acceleration ( 2 equations)

Answer 10

a = v^2 / r & a = w^2 r

Question 11

Terminal velocity of a falling object

Answer 11

Velocity at which an objects air resistance/friction matches its weight

Question 12

Hooke’s law

Answer 12

Force = -kx

Question 13

Potential energy of a spring

Answer 13

E = 1/2 kx^2

Question 14

Work done

Answer 14

E = Fd

Question 15

What do waves do?

Answer 15

Transfer energy without net movement of matter

Question 16

Examples of longitudinal waves

Answer 16

Sound waves
Ultrasound
P waves

Question 17

Examples of transverse waves

Answer 17

Electromagnetic
S waves

Question 18

Amplitude

Answer 18

Maximum dispacement (m)

Question 19

Frequency

Answer 19

Oscillations per second (Hz)

Question 20

Period

Answer 20

Time taken to complete one oscillation (s)

Question 21

Wavelength

Answer 21

Distance from identical points on two adjacent waves (m)

Question 22

Wave formula

Answer 22

wave speed = wavelength x frequency

Question 23

Law of reflection

Answer 23

Incident angle = angle of reflection

Question 24

Refractive index

Answer 24

n = speed of light / speed in substance

Question 25

Snell's Law

Answer 25

n1sinx1 = n2sinx2

Question 26

Critical angle

Answer 26

sinc = n2 / n1

Question 27

Conditions for total internal reflection

Answer 27

Travelling to a less dense medium (n2 < n1) Angle of incidence > critical angle

Question 28

Interference

Answer 28

When two waves meet their amplitudes are added

Question 29

Constructive interference

Answer 29

Occurs when waves meet in phase

Question 30

Destructive interference

Answer 30

Occurs when waves meet out of phase

Question 31

Charge

Answer 31

current x time

Question 32

Energy =

Answer 32

potential difference x charge

Question 33

2 power equations

Answer 33

voltage x current energy / time

Question 34

Series circuits

Answer 34

Current is the same throughout the circuit Resistance of each component is added Voltage is shared between components

Question 35

Parallel circuits

Answer 35

Current divided between paths 1/RT = 1/R(1) + 1/R(2) ... Voltage in each branch is equal to total voltage

Question 36

Force between two point charges

Answer 36

Force= kQ1Q2 / r^2

Question 37

Force on a point charge in an electric field

Answer 37

Force = Charge x Electric field

Question 38

Photoelectric effect equation

Answer 38

hf = work function + max kinetic energy

Question 39

Force between two masses

Answer 39

F = GM1M2 / r^2

Question 40

Geostationary orbit

Answer 40

Moves with the same angular frequency as the object it is orbiting

Question 41

Capacitators

Answer 41

TBA

Question 42

Diffraction

Answer 42

TBA