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2019-20 N. American Planner_DP Sample

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USEFUL INFORMATION<br />

MATHEMATICAL LAWS, FORMULAE, SYMBOLS<br />

FORMULA VARIABLES UNITS FORMULA VARIABLES UNITS<br />

d = ut + 1 at 2<br />

2<br />

d – distance<br />

u – initial velocity<br />

a – acceleration<br />

t – time<br />

m. metres<br />

m/s<br />

m/s 2<br />

s, seconds<br />

P = VI<br />

P – Power<br />

V – Voltage<br />

I – Current<br />

w, watts<br />

v, volts<br />

A, amps<br />

d = vt<br />

d – distance<br />

v – average velocity<br />

t – time<br />

m, metres<br />

m/s<br />

s, seconds<br />

W = Vlt<br />

W – electrical energy<br />

V – Voltage<br />

I – current<br />

t – time<br />

J<br />

V<br />

A<br />

s<br />

v = u + at<br />

v – final velocity<br />

u – initial velocity<br />

a – acceleration<br />

t – time<br />

m/s<br />

m/s<br />

m/s 2<br />

s, seconds<br />

l = Q t<br />

I – current<br />

Q – electric charge<br />

t – time<br />

A<br />

C, Coulombs<br />

s<br />

v 2 = u 2 + 2ad<br />

v – final velocity<br />

u – initial velocity<br />

a – acceleration<br />

d – distance<br />

displacement<br />

m/s<br />

m/s<br />

m/s 2<br />

m<br />

V = IR<br />

(ohm’s law)<br />

V – Voltage<br />

I – current<br />

R – resistance<br />

V<br />

A<br />

O, ohms<br />

a = v - u<br />

t<br />

a – acceleration<br />

v – final velocity<br />

u – initial velocity<br />

t – time<br />

m/s 2<br />

m/s<br />

m/s<br />

m<br />

V = W Q<br />

V – potential difference<br />

W – work<br />

Q – electric charge<br />

V<br />

J<br />

C<br />

F = ma<br />

F – resultant force<br />

m – mass<br />

a – acceleration<br />

N, Newtons<br />

kg, kilograms<br />

m/s 2<br />

P = W t<br />

P – Power<br />

w – work<br />

t – time<br />

W<br />

J<br />

s<br />

Fg = Gm1m2<br />

r 2<br />

Fg – gravitational force<br />

G – universal gravitational<br />

constant 6.67 x 10 -11<br />

m1m2 – masses of 2 objects<br />

r – distance objects apart<br />

m/s<br />

m/s<br />

kg<br />

m<br />

E k<br />

= 1 mv 2<br />

2<br />

E k<br />

– kinetic energy<br />

m – mass<br />

v – velocity<br />

J<br />

kg<br />

m/s<br />

d = m v<br />

D – density<br />

m – mass<br />

V – volume<br />

kg/m 3<br />

kg<br />

m 3<br />

E p = mgh<br />

E p – potential energy<br />

m – mass<br />

g – gravitational field strength<br />

h – height<br />

J<br />

kg<br />

N/kg<br />

m<br />

P = mv<br />

P – momentum<br />

m – mass<br />

v – velocity<br />

kg m/s<br />

kg<br />

m/s<br />

F e<br />

= kQ 1 Q 2<br />

r 2<br />

F e – electrical force<br />

k – Coulomb’s constant 9x10 9<br />

Q 1<br />

Q 2<br />

– electrical charges<br />

r – distance charges apart<br />

N<br />

N/m 2 /c 2<br />

c<br />

m<br />

W = Fd<br />

W – work<br />

F – force<br />

d – distance<br />

J, joules<br />

N<br />

m<br />

H = CmDT<br />

H – heat energy<br />

c – specific heat<br />

m – mass<br />

DT – change in temperature<br />

J<br />

J/kg ºC<br />

kg<br />

ºC, celsius<br />

F = -kd<br />

(Hooke’s Law)<br />

F – restoring Force<br />

k – spring constant<br />

d – spring’s displacement<br />

from natural length<br />

N<br />

-<br />

m<br />

157<br />

<strong>20</strong>18/19 Intl <strong>Planner</strong>_<strong>DP</strong>_REAR.indd 157 25/5/18 3:15 pm

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