Hi, My name is Jared Rovny, I’ll be your guide
through physics, sometimes perceived as one of the
more challenging of the hard sciences. And so
for that reason many students especially students
in the medical field ask me why do I need this
why do I need to be studying physics if
I’m going into medicine. And so briefly I’m gonna
cover some important reasons I think that this
will be a useful thing for you, something that
you can take with you in the future. And then,
what we’re gonna do for the rest of this introduction
is first get a quick overview of the entire course,
the topics we’re gonna be looking at and why we’ll be
looking at them. And then at the end of this introduction.
before we’re getting into the actual physical content,
we’re going to go over some key skills that will be
very useful to you as you’re working any of
these problems that we’re going to cover
or as you go through
an exam setting or something for the future.
The first, why are we studying physics?
Why does somebody who’s going to go into medicine
need to know physics? I’m gonna briefly cover
3 reasons that I think are really good reasons
that you should be paying close attention in
your physics course. First, for historical reasons
you should understand that physics’s played a
huge role in the medical sciences and the kinds of
technology people’ve been able to come up with
and understand using regress physical methods
and quantitative methods to come up with all sort of
technology from MRI to PET scans to X-rays and
many things that you’ll be seeing and using.
And for that reason, it’s very important to be able
to understand what these instruments are telling you
and how to interpret the physics behind what you see
so that you can actually give a proper interpretation
to the results and that brings me to
the second point which is that physics
practical in the actual medical room.
When you’re looking at a patient who has any number of
issues, everything about that patient is a physical system.
The blood flowing through their vein is going to
follow the fluid laws we discuss, as well the air going
in and out of their lungs. Even the mechanical structure
of their bones and the kind of stresses that they feel.
From this or that thing, this or that reason
or injuries. All follow physical laws.
For that reason, even right in front of your patient,
it’s important to know some of the basic mechanics
and the basic laws of physics that that person’s body
and yours and mine and everybody’s has always following
And finally, one of the most important reasons
to really work hard at physics and to understand
what we’re gonna discuss is that the logical structure
that we’re going to approach physics with will be very
very useful in many other fields. Physics is
important in a particular way, in a peculiar way
different from many other academic subjects
in which you’re given a lot of information
and then you just have to reiterate
that information in maybe an exam or something
In physics, it’s different, we’re not going
to do that. We will give you a lot of information
but the idea will be you’ll be ask questions
to which you do not know the answer.
And this is very jarring for student sometimes
initially. So it’s good to know and to expect that
this will be the case . They will ask questions
and we don’t know the answer to those questions.
And even I when I’m going over problems
with students or with colleagues, I never know
the answer to the questions beforehand.
That’s not how we solve them.
We solve them because what we’ve done in physics
is to build a logical structure, a way to proceed
when you met with something intimidating
and frightening even, that your first reaction
and the first rule for any physics problem is to
not panic. And so that will be our guiding principle
as we’ll meet something that might look intimidating.
We’ll start at the beginning, proceed logically,
not panic, and solve the problems and
that mindset will be very useful to you I hope,
as you’re going to further disciplines. So with that,
let’s get started. We’re gonna, first as I said
do an overview but it’ll be important as we go that
you’re be able to know what we might have
at the top right are some labels, some important
labels for you that you’ll be able to help bookmark
your studies with as we go so you can see,
go highlight things that are important during an exams,
or highlight important definitions that you might wanna
write down or look over and refer to in the future.
We’re walking through a lot of examples and so I always,
always encourage you to try to look at the example
yourself first and pause if you need to and give them
a shot because even if you give it a quick try
you’ll learn far far more from, when I do it if you
try to tackle it first yourself. And then finally,
we will be covering a number of equations, which it’s
not something you want to memorize all the time but
you'll certainly want to understand how to interpret these
equation and so if you see an equation and the letters
you don’t always understand each letter, take the time
to really understand what the letters mean
because then you may not have the equation in your head
all the time but the principle behind that equation
will always be with you and you’ll be able to
recall that in the future with far more ease than
if you remember the equation by its letters.