ALL YEARS – *All the equations, ways to remember them, and what they stand for!*

Question 1

How do you work out efficiency?

Answer 1

.
. useful energy output
Efficiency (%) = —————————— x 100
. total energy input
.

Question 2

What is the equation for Work Done?

Answer 2

E = F x d

E = Work Done – Joules (J)
F = Force – Newtons (N)
d = Distance moved – (m)

Question 3

How do you remember the Work Done equation?

Answer 3

It is the “FEd” triangle

You need to be “FEd” to get the WORK DONE!!!

Question 4

What is the equation for Power?

Answer 4

.            E
P = ———
.            t
P = Power – Watts (W) or (J/s)
E = Work Done – Joules (J)
t = Time taken – (s)

Question 5

How do you remember the Power equation?

Answer 5

It is the “PEt” triangle
P = E/t
“PEt”s have POWER over you, cause u lurrrve them!!!!

Question 6

What is the equation for Density?

Answer 6

.           m 
p = ———
.           v
p = Density (Rho) – (Kg/m3) or (g/cm3)
m = Mass – (Kg) or (g)
v = Volume – (m3) or (cm3)

Question 7

How do you remember the Density equation?

Answer 7

Rho my viking warship!!!

Rho (p) = m/v

Question 8

What is the (general) equation for Pressure?

Answer 8

.            F
P = ———
.            A
P = Pressure – Pascals (Pa)=(N/m2) or (N/cm2)
F = Force – Neutons (N)
A = Area – (m2) or (cm2)

Question 9

How do you remember the (general) Pressure equation?

Answer 9

Pretty Fat Animal
Pretty Fat Animals put a lot of PRESSURE on the ground!
Or Pretty Far Away

Question 10

What is the equation for Pressure (in liquids)?

Answer 10

P = p x g x h

P = Pressure – Pascals (Pa)=(N/m2)
p = Density (Rho) – (Kg/m3)
g = Gravitational Field Strength – (N/Kg) (on Earth this is 10)
h = Height of the column of liquid above it – (m)

Question 11

How do you remember the Pressure (in liquids) equation?

Answer 11

Plants grow in ‘rho’s with a hose!
P = rho x g x h
Plants grow in ‘rho’s with a PRESSURE hose!

Question 12

What is the equation for Average Speed?

Answer 12

. d
s = ———
. t
s = average speed – (m/s) or equivalent.
d = distance/displacement – (m) or equivalent.
t = time – (s) or equivalent.

Question 13

How do you remember the Average Speed equation?

Answer 13

Sid does triathlons
s = d/t
Sid does triathlons with an AVERAGE SPEED
Or Silly Daft Twit

Question 14

What is the equation for Acceleration?

Answer 14

.       (v – u)
a = ———
.            t
a = acceleration – (m/s2)
v = final velocity/speed – (m/s)
u = starting velocity/ speed – (m/s)
t = time – (s)

Question 15

How do you remember the Acceleration equation?

Answer 15

Apples, Victoria plums and Ugli fruit all grow on trees!
a = (v – u)/t
Apples, Victoria plums and Ugli fruit all grow on trees, an when they fall, they ACCELERATE towards the ground!
Or All Very Tired

Question 16

What is the KINEMATIC equation for Acceleration (if we don’t know time)?

Answer 16

v2 = u2 + (2 x a x s)

v = final velocity/speed – (m/s)
u = starting velocity/ speed – (m/s)
a = acceleration – (m/s2) 
a = distance/displacement – (m)

Question 17

How do you remember the KINEMATIC equation for Acceleration (if we don’t know time)?

Answer 17

vegetables usually ate 2 spuds.
v2 = u2 + (2 x a x s)
vegetables usually ate 2 spuds which ACCELERATED their growth!!!