Gravitational Force and Fields
The lesson covers the concept of gravitational fields and the laws of gravitational force as proposed by Isaac Newton. It explains the relationship between masses and the distance between them in determining gravitational force.
- 18:29 “Alright, from this place now, we have that what the V square, which is equal to 2G M over R. Now, make V, the subject of the formula, we have the V is equal to the square root of 2G M over R, we give us this, now, let's...”
- 13:35 “I'll have it to watch. I'll have it to be MV square X over R. It's equal to the force, giving to us, which is G, M1, M2, over R2. Now, I can take care of this. One of these can take care of this. Then, I'll have it to be...”
- 21:05 “now from here, which you have that R, that's R, R E is what is reduced, reduced of DX, all right, from questions, let's take question from this, now the question is, two objects of masses, seven KG and six KG are separat...”
Work, Energy and Power
This lesson covers the definitions of work, energy, and power. It includes calculations for work done, gravitational potential energy, and power in watts. The lesson also distinguishes between kinetic and potential energy and explains energy transformation and the law of conservation of energy.
- 16:03 “Now, in solving this, just like we state the formula, potential energy equals MgH, where M is the mass of the objects. G is associated to gravity and H represents the height to which the object is raised. Now, our M equa...”
- 14:26 “But when an object is at rest, that particular object possesses what we call potential energy. Now, potential energy. Potential energy, this is energy possessed by a body, by a virtual of its position at rest. If an obje...”
- 04:00 “And that is 300 Jews or 300 Newton-Meta. Another example, where we have situations in which a force is applied to a body at an inclined angle theta. The formula will change a little bit. And that would be F multiplied by...”
Fundamental and Derived Quantities
This lesson covers the definitions of fundamental and derived quantities in physics. It explains how fundamental quantities serve as the base for deriving other quantities and the importance of measurement in physical science.
- 23:44 “its scalar quantity, but a weight as magnitude and the direction and hence its vector quantity. The third one is it is the amount of matter contained in a body as explained earlier, the amount of matter, which is the fun...”
- 21:17 “This is the mass times the weight, the acceleration due to gravity. And the mass is always major in kilogram as said earlier why the g, which is the acceleration due to gravity, is having an equivalent unit with the norm...”
- 20:28 “So I need to clarify this more and more at this point in time. When we talk about mass, we are talking about the quantity of matter contained in a body. The quantity of matter contained in a body. And the mass of an obje...”
Work, Energy and Power
This lesson covers the definitions of work, energy, and power. It explains potential and kinetic energy as forms of mechanical energy. The lesson also includes calculations related to work done and the concept of power as the rate of doing work.
- 11:31 “Now, it is given by MGH, where M is the mass of the body. Now, G refers to acceleration, but this small G you see is acceleration due to gravitational force. And its value is about 9.8 m/s square, but it can be approxima...”
- 12:22 “That is, the force of the body over the mass of the body. Whereas, the distance covered by the object is usually measured in kilometers or meters. Let's take an example. The question says, find the potential energy of an...”
- 17:34 “The second question says, a boy of mass 10 kg runs up a staircase having a height of 3.00 meters. Find the work done against gravity. And we are giving an acceleration due to gravity, same as the first question, 10 meter...”
Equilibrium of Forces
This lesson covers the concepts of static and dynamic equilibrium. It explains resultant and equilibrant forces, the moment of a force, and the conditions for equilibrium under non-parallel forces. The lesson also discusses the center of gravity and its effect on stability.
- 16:07 “The center of gravity here, looking at it, is 50. So if the full crew is here, that means that is 50. Ah, the question says that a load of 40 Newton is suspended at 20 centimeters. So let's assume this place is 20 centim...”
- 21:11 “times the distance between the force and A. The force is 30 times distance between 30 and A. Is 6. This time between 30 and A is 6. Most be equal to another force, that's force F. Times the distance between F and E or A....”
- 22:07 “the subduer formula, which is 30 times 6 divided by 14. So our F equal to 12.9 newton. So our force F equal to 12.9 newton. Mind you, we derived an equation based on the law that the sum of the forces acting upward must...”
Projectile Motion
This lesson covers the definition of projectile and projectile motion. It explains the concepts of time of flight, maximum height, and range, along with the relevant equations and examples from sports and warfare.
- 03:57 “Just like we said in the last session that when an object is projected vertically upward, it will get to a particular height that it will be able to move upward again. It will stop momentarily before coming down. And tha...”
- 09:42 “Now, we want to get the range. Now, we are going to make use of the equation R which is H equal to U T plus R GT squared. Now on the horizontal plane according to the definition of range, there is no gravity on the horiz...”
- 10:28 “The object has landed. So we now substitute the horizontal. Now, we have R equal to U cos theta horizontal. And times our capital letter T, I hope you remember, 2U sin theta over G times 2U sin theta over over G. So afte...”
Magnetic Fields
This lesson covers the concept of magnetic fields, including types of magnets such as bar magnets. It explains the flow of magnetic forces from the North pole to the South pole and the principles of attraction and repulsion between magnets. The lesson also touches on how to create a magnet and the c
- 33:44 “Now, we have that our force is given. Let's make use of our calculator. We have 1.6 times 6.7 times 10. Now, give us 1.7.2 times 10 times 10 times sin 80.”
- 34:35 “Then, we have this to be f is equal to 10 times 7.2 times teris per minus 10 times sin 80. From here, we have the force is equal to this point 2. Now, we have to get sin 80 times this sin 80. Because our calculator does...”
- 35:24 “So, you can use your calculator to get sin 80 that you multiply everything to get the answer in new thing. Now, let's look at the second question which is b, b parts. The same thing is applicable. Let's start from this p...”