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dinky dav, freddy barkrab & mgb the yak - physics rap 2 lyrics

[intro: mgb the yak]
dj yak!
barkrab, d+nky dav
back for another one
this the physics rap 2
scalars and vectors for you
let’s go
dj yak, mgb in the house

[verse 1: d+nky dav]
it’s brand, it’s new, physics rap part two
coming straight back to the scene it’s time for you to get a clue
yeah we’re the best, we’re undefeated, all you others gotta queue
all these other raps in physics, they can’t even lace our shoes
so a scalar is a quantity, common, it’s not an oddity
always, it’s giving more for me, vectors are quite the contrary
a scalar can be measured and has magnitude they usually
have a special unit, all of which are standardised
like distance, how far it is from here to there
there’s always one straight line between two points, i’m sure you’re aware
it’s a fundamental scalar we use metres to measure
and it’s commonly accessible to use at your pleasure

[verse 2: freddy barkrab]
vectors are scalars with added direction
i implore you to listen to my nifty collection
of multitudinous variety for your selection
anything but gratitude would be insurrection
your tentative perusal shall meet with your approval
and any refusal will result in your removal
force! it’s irresistible and unequivocal
if you feel attracted, force has been exacted
newtons is the measure, learn it at your leisure
an apple fell on newton’s head
he was confused and then he said:
wait, no i mean weight
it seemed it was his fate to find the force that pulls us down
magnitude towards the ground,it’s a vector, cector
other types of force exist, just as taxing to resist
in fact there’s quite a list, friction, drag, magnetic too
thrust and torque to name a few
now you know some types of force
you can see that they are of course
vectors, vectors
[verse 3: d+nky dav]
temperature’s another one you just can’t beat
it’s a classic scalar sample used to quantify heat
there’s a triplet of scales, namely k f and c
but only two should be studied by people like you and me
you see, absolute zero is a point on the scale
the lowest energy for particles is what it entails
for kelvin it’s at zero, quite intuitively
and for celsius we shift it minus 273
while the negative sign is known to cause some deception
just remember that a temperature cannot have a direction

[interlude 1: mgb the yak & d+nky dav]
we’re just having a short two bar interlude before freddy’s+
(we’re having a, we’re having a)
okay now stop
(short two)

[verse 4: freddy barkrab]
displacement is the distance that you moved
in a single direction so now we’ve proved
it’s a vector, vector
if i leave my house for an evening walk
take a turn up the road but then return to my humble abode
i haven’t changed from my original position
displacement is zero, no subtraction or addition
if i go from a to b
as fast as my little legs can carry me
displacement stays the same when i go direct
as it does if i take a shortcut through budapest
if you need assistance
don’t forget displacement is the distance
from beginning to end
in a line that does not bend!
[interlude 2: mgb the yak, freddy barkrab & d+nky dav]
we’re just taking a short two bar interlude now
(two, two bars)
it’s david’s turn now
just two bars, we’ll be right back
that’s three bars now, david
three bar interlude
three+ short six bar interlude
short five bar interlude

[verse 5: d+nky dav]
up next, it’s speed, quite a common one indeed
as a scalar it’s essential, like the bread that you knead
in case you don’t already know, we’re trying to teach you teach you a lesson
the si unit of speed is known as metres per second
if you can’t see it already, you should go to an optician
speed is really just an object’s rate of change in position

[verse 6: freddy barkrab & mgb the yak]
you’ve heard of speed, but what about velocity
i want you to heed my words with curiosity
velocity is speed but in one direction
it could be north, south, west or another choice from your selection
forwards with a plus, backwards with a minus
it’s so easy to say, you’re going every which way
(which way are you going freddy?)
[verse 7: d+nky dav]
next up, it’s mass, measured in kgs
in so many equations, remember mass is the key
it’s at the base of modern physics, like the trove of a treasure
just don’t mix it up with weight; which we use newtons to measure
density’s another scalar we can derive
get a mass and then a volume, now you need to divide
the units are easy, without being too rude
just pluck them out of the equation: kilograms per metre cubed

[verse 8: freddy barkrab]
let’s say you’re moving but you’re going real slow
to use the right lingo your velocity is low
you want to increase it but don’t know how
just accelerate a bit, you’re going faster now!
acceleration’s how fast you’re changing speed + ain’t that sublime
just take the difference in velocity and divide it by the time
it can be positive or negative just like velocity
one makes you faster, the other slow
just look at the symbol and then you’ll know

[verse 9: d+nky dav]
energy! we’re near the end, you must be overjoyed
but just avoid, saying it can be created or destroyed
only transferred in between two forms, something that you’ll
always keep in your memory, and know its units are joules

[verse 10: freddy barkrab]
so finally momentum wow, we’ve got quite far
and it feels harder to stop with every bar
i’ve accidentally shown you what momentum can do
it’s the force that keeps things going the way they’re headed to
once you’ve got moving it’s harder stop
and changing direction could therefore take quite a lot
momentum is bigger if you’ve got more mass
it’s harder to move a truck than a sea bass
momentum is found by mass times velocity
don’t forget it or you’ll face my full ferocity
momentum can’t be lost, even when you’ve stopped
it’s simply passed on to the things around you
if you don’t believe me, ask a pool cue

[outro: mgb the yak]
thanks for coming everyone
it was really nice to talk to about scalars and vectors today
thank you bye

[mgb the yak]
…i stay clear of them
but when i go delirious i’m like h2o
i think that’s something that rhymes for sho’
so when i come back, i’m in o+town
and when they come around, i give them a frown

[d+nky dav walks the wrong way around the pillar]

[freddy barkrab]
i+i don’t, i like
i don’t think this is the way that we should be doing our video

- dinky dav freddy barkrab mgb the yak lyrics

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