Fluid Mechanics & Physics of Gravitation (AP Physics -2019)
4.6 (17 ratings)
Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately.
1,369 students enrolled

Fluid Mechanics & Physics of Gravitation (AP Physics -2019)

28 videos & 3 hours of physics classes on fluid behavior and laws of gravitation; uses differential equations & calculus
4.6 (17 ratings)
Course Ratings are calculated from individual students’ ratings and a variety of other signals, like age of rating and reliability, to ensure that they reflect course quality fairly and accurately.
1,369 students enrolled
Created by Vishesh Nigam
Last updated 10/2019
English [Auto]
Current price: $13.99 Original price: $19.99 Discount: 30% off
5 hours left at this price!
30-Day Money-Back Guarantee
This course includes
  • 3 hours on-demand video
  • Full lifetime access
  • Access on mobile and TV
  • Certificate of Completion
Training 5 or more people?

Get your team access to 4,000+ top Udemy courses anytime, anywhere.

Try Udemy for Business
What you'll learn
  • What is Pressure in Fluids?
  • Fluid Pressure in Static Fluids
  • How to find Pressure in Fluids?
  • Archimedes Principle
  • Bernoulli's Equation
  • Newton's Universal Law of Gravitation
  • Gravitation Near Earth's Surface
  • Gravitational Force inside Earth
  • Gravitational Potential Energy
  • What is Escape Velocity
  • Kepler's 3 Laws
  • Kinetic and Potential energy of a Satellite
  • Each lesson starts with basic physics before it reaches advanced level. You'll understand faster if you have some foundation in physics (say class 10)

Learn physics faster and better!  physics is not difficult!  It just needs some time, focus and a good teacher :)

This physics course includes 28 videos totaling 3 hours of run time. Once you are enrolled in the course, all you need is a note book and  a pen to get cracking on these topics

  • Pressure in fluids

  • How to measure pressure in fluids

  • Bernoulli's equation and Archimedes principle

  • Fluid pressure in static fluids

  • Newton's universal law of gravitation (gravitation near earth's surface, gravitational force inside earth)

  • Gravitational potential energy and escape velocity

  • Kepler's 3 Laws (kinetic and potential energy of a satellite)

Whats different about my courses:

When I create content for the lessons, I think deeply around the areas where students struggle and feel confused. My lessons tackle these parts in depth. Also, I believe visual representation of various ideas makes a lot of impact. The lessons have visuals and animations that are thought through quite deeply for maximum learning impact

And most importantly, I make myself available to answer questions of the enrolled students

...and this is what my students wrote to me

Csaba:                                        I learned new ideas of approaches. I'm looking to try them in my professional practice as a teacher.Thanks! :)

Bobbie Smith:                           Amazing explanations, I really learned a lot. Thank you.

Satyam Jha:                               amazing!! i could not understand vectors in my class but here it is very easy to understand Thanks a lot!!

Fernando  P. Radaza:              It help me a lot to understand better about Physics of Work, Power & Energy.

Chamara Dilshan:                    it's good, explaining every small thing ,it's good to start physics beginners

Onofrio :                                   The lessons given by the teacher are very interesting! Excellent course!

Simaran:                                    Very deep understanding of the subject

Shiva:                                          Very knowledgeable and sounds very nice and helpful

Gallina:                                       Excellent the lessons held by the teacher with exhaustive explanations and well illustrated. Well done course! Smith:                                         Great course.The presentation is very clear. Thank you.

Pawan Kumar:                         The way to teaching us is amazing with all diagrams

Samit                                          This course has a lot of good content and very well presented. Thank you

Dani:                                            It was concise and consequent. The exercises were good exposed and explained. Simply excellent. I promise,   .                                                    that i will use some ideas in my every day practice in my classroom. I'm also teaching physics, but in Hingarian. .                                                    I finished this course to improve my skills, first of all in interesting approaches, and foreign language skills as                                     .                                                    well. This course was exactly what I expected!

Well, you get a lot more than you think

  • You get lifetime access to this physics course

  • You can write to me for any support

  • A certificate of completion from Udemy

  • money back guarantee (valid within 30 days)

Lets start a conversation! go ahead and enroll !!

Who this course is for:
  • Students in High School, AP Physics 1, CBSE
  • Students preparing physics for competitive exams - Physics for IIT JEE, NEET, Subject SAT and Freshman engineering
  • Physics enthusiasts and curious minds
  • Students in home schooling program
  • Physics teachers who wish to improve their physics teaching skills
Course content
Expand all 28 lectures 03:04:45
+ Fluid Mechanics (AP Physics) - 5 Lessons and 7 Solved Problems
12 lectures 01:39:11

What exactly is Pressure in fluids. Welcome to another very interesting chapter in Mechanics.

Well!, when we hear the word mechanics, we often think about blocks and pulley, speed and velocity, friction, projectiles and so on.  But this chapter is unique, and here we will talk about mechanics of fluids. And it is so important to study this because fluids play such an important role in our lives, from blood pressure to pressure in a water dam, or hydraulics of a car to that used in ships.

Preview 10:22

Fluid pressure in static fluids is often confusing for students. The Physics behind it is actually quite simple. The fluid pressure at any point within a liquid can be found by measuring the height of the liquid column above the point and calculating the force and pressure exerted by that column. This could then be expressed as gauge pressure at a point or the absolute pressure.

Watch this video to understand the topic and Newton's second law can be used to great effect in deriving solution of pressure in static fluids. 

Fluid Pressure in Static Fluids

How to find pressure in fluids?, is a common question students ask. This is primarily due to several variations that are possible when dealing with fluids. This lesson brings conceptual clarity around pressure calculations for manometers, barometers and U tube setup and also elaborates on how numerical problems can be solved with a systematic approach.

How to find Pressure in Fluids?

Archimedes principle is often not understood well despite its simplicity. To make complete sense of it, watch this video.

The lesson dives into how you can find the buoyant force on a body and then when you substitute that body with any other, like iron or wood, how the body behaves. You'll learn why a piece of iron sinks and why wood pops up to float. Understand in this lesson various forces that act on a body and make the body behave in certain ways.   

Archimedes Principle Simplified

Bernoulli’s equation is a fantastic piece of work in Physics that makes use of energy conservation to connect 3 variables -velocity, pressure and height, that describe fluids in motion.

You’ll be surprised to know that this equation, given by the famous scientist Daniel Bernoulli in 1700's, is used to analyze plumbing systems, hydroelectric power generation stations and even flight of planes.

So let us go ahead and derive Bernoulli’s equation. Well, before we derive Bernoulli’s equation, we need to make 2 important assumptions. (1) The fluid under consideration is in-compressible and (2) it also does not offer any friction or has zero viscosity.

Preview 14:02

The problem requires us to find the height of the mercury column when the glass tube carrying it is shut of from one end and the tube is pulled up to a certain height.

Height of Mercury Column

Hydro static force puts pressure on the surface of submarine. What would be the force required to push open an escape door of a submarine if the submarine is at a certain depth inside water.

Pressure inside a Submarine

Average pressure experienced by wall of an aquarium due to varying height of water requires use of integral calculus to find. See how we can make use of it to solve this problem

Hydro static Force on an Aquarium Glass

How does a fish change altitude or height in water so easily. The physics around it has to do with the ability of a fish to change its volume and change its density to either stay in one place or go up or down. When it is in one place the force of buoyancy is equal to the force of gravity on the fish. Thus it makes use of Archimedes principle to swim at will! 

How do Fishes Swim?

Pascal's law as applied to spring force can make for an interesting problem. Learn use of Pascal's law in this problem 

Pascal and Spring Force

Blood pressure generated by the heart of an Argentinosaurus is to be found using principles of fluid mechanics. Thus the pressure generated at the heart should be sufficient to pump it up to the brain so that the animal can walk and function 

Preview 03:39

A dam is subjected to large forces by water that can cause torque on the wall of the dam as well. Explore this aspect in this problem

Torque on Wall of a Dam
+ Newtons Universal Law of Gravitation (AP Physics) - 7 Lessons & 9 Solved Prob.
16 lectures 01:25:34

Newton's universal law of gravitation explains so many things that happen in the universe. From why we are able to walk easily on earth and not fly of, when we take a step, to why an apple falls towards the earth. It is amazing that the entire solar system, galaxies with its stars and the universe itself is in a breathtaking equilibrium and does not really collapse. In fact, it does a cosmic dance.

Newton's Universal Law of Gravitation

If Earth is considered a uniform sphere of mass M then the gravitational force on any particle of mass m at a distance R from the center of Earth can be given as F = GMm/R (sq). Then this force can be equated with the product of its mass and the acceleration in the classic Newton's equation F = m X a. Well if the mass is close enough to earth surface, this a = g.

Gravitation Near Earth's Surface

When we are asked “what is the potential energy of a particle “h” meters above the earth’s surface, we are quick to answer that it is mgh. And we are absolutely correct or let me say, almost absolutely correct. Watch this video to see how it relates to this topic

Gravitational Force inside Earth

The concept of Gravitational Potential Energy is often misunderstood. However, a systematic step by step approach to it can make it a very simple and useful.

When we consider distances that are comparable to earths radius, we cannot really make the assumptions of gravitational force being a constant mg. Well the gravitational force changes as the distance from the earth increases. Hence the PE.

Gravitational Potential Energy

If you throw a ball up in the air, we know it will come back to us on earth. If you throw it harder, or in other words give it “more” initial velocity, it will go up higher but still come back. What if you were to build a super cannon that can give enough velocity to the ball so that it “never” comes back to earth.

Well, some of you might think that I am talking science fiction, but the truth is that if you can impart a velocity of 11.2 km/s to this ball, this ball will never come back to earth. This is then what we call the “escape velocity”. Theoretically, this ball would keep moving away from earth and to infinity. So let us go ahead and find how we can find this escape velocity of 11.2 KM/s

Escape Velocity

For centuries the movement of planets around the Sun was a big mystery till Johannes Kepler, after a long time established some empirical laws that explained the nature of motion of planets around the Sun.

In fact, later, Newton found that his law of gravitation also lead to Kepler's law. What amazes me and would surprise most of you is all these great scientists figured out the nature of motion without any telescope or modern observatories we have today.

Learn more about Kepler's laws in this lesson

Preview 09:04

Kinetic and Potential energy of a Satellite in Orbit is determined by its position and velocity. While the Kinetic and Potential energy may vary at different times, the total energy remains constant. Thus the KE is dependent on the velocity of the satellite and the potential energy depends on the position or the distance from the Earth.

Watch this video to see how the total energy, often denoted by symbol E connects with Kinetic Energy KE and Potential Energy U

Kinetic and Potential energy of a Satellite

The problem has 3 masses whose placement needs to be worked out so that the force on one of the masses becomes Zero

Force between Masses A, B and C

What is the gravitational force due to a ball that has a cavity in it on another mass at a distance d.  The answer lies in first finding the mass of the ball scooped out of the large ball and finding the force on account of that. We then subtract this force from what the force would have been due to the ball if there was no cavity. 

Cavity in a Ball - Resulting Forces

Gravitational force on a ball due to a long rod would require use of integral calculus. The rod due to its length exerts different gravitational force due to each part of the rod that is at a varying distance from the ball.   

Ball, Rod, Gravitation & Integral Calculus

What is the gravitational force of a red planet when you are standing on it and then when you are standing inside it? The problem requires you to understand the relevance of mass to be taken when plugging into Newton's law of gravitation 

Preview 02:42

The Shell theorem in gravitation is an interesting concept that says that if an object is inside a shell, it will not experience any gravitational force on account of the mass of the shell. This problem illustrates the theorem. 

Shell Theorem Problem

An apple placed inside Earth would experience a certain force of Gravitation. The problem explores what is the distance inside and outside Earth at which the force of gravitation is half that on the surface. 

Apple, Earth and Gravitation

Kinetic and Potential energy of a Satellite in Orbit is determined by its position and velocity. While the Kinetic and Potential energy may vary at different times, the total energy remains constant.

Satellite - KE and PE

A gravitational force is exerted by an unknown planet on a satellite rotating at a radius r. What is the Radius R of the planet given the velocity of the satellite. 

Satellite above the Earth II

Two revolving stars experience the force of gravitation while spin around their center of mass. The problem requires us to find the period of revolution of stars. 

Gravitation force between very large masses