This course is all about Kinematics in 1D, the physics of moving things along a straight line. Kinematics is always the first topic you would have to master in order to understand the laws of the universe.
Everything in the universe is moving, so kinematics is the most fundamental thing you will need to know to do any kind of physics.
I expect no prior knowledge of physics, in order for you to take this course. The only pre requisites are little bit of math (mentioned in the course basics). Although kinematics needs calculus, I will be teaching everything calculus that we will be needed to tackle various scenarios. So don't worry about calculus :)
The course is structured as follows
Concept videos, Practice problem videos, Extra information (Which is not mandatory but helps you get more insight and get more out of the course :))
For every concept, I have included trivial and challenging quizzes to make sure, you can check your understanding and review any material if needed.
So what are you waiting for, enroll for Kinematics 101 and let's get.. wait for it... moving! ;-)
Hello, I am extremely excited to be starting my first course on Mechanics. Kinematics 101. In this course, This course is all about straight line motion or 1 dimensional motion. In this introductory video, I tell you who I am, and what I will be offering for you.
What pre-requisites you need to have (with examples) and why you should take this course, and the most important thing
This Course is 100 percent free of cost. For-ever.
We look at the simplest situation that you can find in kinematics. A particle at rest. We begin by placing an axis and building our very first kinematics equation :)
Let us check your understanding about positions and origin
We continue with Bob at rest, and here, we build a graph for the same situation. Graphing is an important part of kinematics, and if you have no experience in graphing what so ever, don't worry, I give you an intuitive example of graphing :)
Let us see, if you have understood graphing :)
Let us start with some real kinematics now. Bob is now in motion. A special kind of motion, called the Uniform motion. Can you figure out what is so uniform?
If you couldn't figure it out, I make a small diagram, showing the 'snapshots' of bob at various time instants. Let us write down the changes in position for some time intervals. Can you see there is some sort of trend?
What trend do you notice in the above 'uniform motion'?
I will introduce you to the one of the quantities that you will keep hearing in physics over and over again. It is called the 'average velocity'. By the end of this section, you will understand what average velocity means (at least mathematically)
We define Displacement as change in position, which is calculated as final position minus the initial position.
We define Average velocity as the displacement per unit time. Lets put these definitions to the test shall we?
Okay, now time to build the equation for this Uniform motion. Our first equation for moving things. Are you excited already? :)
Let us see if you understood the position function for a uniform motion
Now, we will start graphing Uniform motion. Again I do it intuitively, without expecting any prior knowledge of graphs. After this example, you will understand perfectly, what graphs mean.
A review quiz about graphing Uniform motion
Instant velocity is a brand new concept. Let's do some review before we continue shall we?
Lets see if you have understood the concept of instant velocity
We have seen position time graphs before. But now that we have understanding of velocity, it's time to introduce concept of slope which is a powerful tool in graphical analysis.
Now that slopes are introduced, lets make sure your concepts become concrete before we move forward okay?
Let me show you, how, by using the concept of slope, we can do a great deal of qualitative analysis of understanding motion using xt graphs
Let's strengthen your concept of graph further shall we?
Since we now know, what velocity is, it's time to introduce yet another kind of graph which helps us understand motion. Velocity time graph
Let's check your understanding of VT graphs so far
You can calculate displacement using a vt graph :)
Lets do some review quiz on area under vt graph concept shall we?
Lets connect the dots. (No implied puns) We will now convert from xt graphs to vt graphs to further deepen our understanding of graphical motion
It's time to test your skills on graphical analysis. Let's see if you understand motion enough to convert from xt graphs to vt graphs and vice versa
Finally I will talk about the most common aspect of motion. Speed. Isn't it the same as velocity? Not really. To understand the difference, it's best to take an example of a non-uniform motion. So lets begin
Let's see the concept of average speed in detail and contrast it with average velocity.
Let's make a quick check whether you have understood the idea of average speed shall we?
Just like how we discussed Instantaneous velocity, we use the same concept to understand instantaneous speed and we will compare both and see similarities and differences
Have you understood instant speed? Let's see
This is an optional video. This video just discusses, why, whenever we take a finite time interval and calculate speed or velocity, it becomes the average value. I take some day to day life examples to make you understand this. Ofcourse, if you already know why, you could skip this and go ahead.
Quiz on average values, lets see if you have understood the content (Optional)
We are going to be solving two elaborate problems (Covering all the concepts that we have dealt with so far) in two problems. This is the first one!
Let us consider a race between two vehicles, a sports car and a sports truck. Hold on, don't jump to conclusions yet. There is a small twist. We will make both vehicles equally fast ;-)
Who do you think will win the race?
This small section, will discuss the winner of the race, and a small animation to visualize the concept. We are building up towards the notion of acceleration
What did you see in this video?
Now, that we have some intuition behind, what acceleration is, let's define it and understand it better shall we?
Let's test your understanding about acceleration shall we?
What many beginners in physics get wrong is this. The direction of acceleration. Since acceleration is a common word, we often tend to confuse it with velocity. So here lets see how to get the direction of acceleration intuitively.
More quiz on direction of acceleration
Lets check our understanding of direction of acceleration shall we? Let us take more examples to see that we really have understood acceleration directions
This quiz will check if you could grasp the direction of acceleration.
This is a bonus section, meaning not really a new concept. But I highly recommend it, if you are a beginner. I distinguish between 'velocity' and 'change in velocity'. These two are not the same things ever. And it is super important to understand this stuff to really get a grasp of accelerations
Hello there, I am Mahesh Shenoy, but you can call me Mashy
I am basically an electronics engineer, but I shifted branches from applied electronics to pure science - namely physics about 4 years ago. My passion for physics grew watching the famous Walter Lewin lectures on youtube, and I always had a thing for teaching. As a student I know exactly what makes lectures boring, and uninteresting. I have dedicated past few years to master physics and teaching. I would say I am quite pleased with where I stand
Whether you will be able to master concepts of physics, is something that only you can decide. I can promise you, if you hear me out, I ll make you love physics. I ll make you see physics in your everyday world, and your life will never remain the same!