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.
- 24:48 “unlike the example that we did. Thank you for watching. My name is Mr. Bakari. Till next time.”
- 19:28 “So that's the diagram there. So we are looking for E, okay, the reaction forces at A and B as shown. Now we have three forces acting. We have three forces acting on this road CD, force E, force F and force 30 newton. Now...”
- 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....”
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...”
- 24:36 “at the pull of the x in the equator, the weight of an object varies. So the fifth one is that it is major using physical balance and the weight of an object it is major using is spring balance. So one important thing we...”
- 18:56 “Spring balance. This is also one of the majoring device, but it does not measure the mass directly. It's measures the weight of an object. So this balance helps to find the weight of an object. It's consists of a spring,...”
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.
- 04:03 “This displacement is talking about the distance covered in any given direction. And like I said, there is an exception when the force acts perpendicularly to the direction of its force. An example is a man who is pushing...”
- 00:50 “Then the third one is to be able to explain the concepts of potential kinetic energy which are the two forms of mechanical energy. Then the last objective is to be able to solve calculation problems that arise from probl...”
- 01:44 “Now, for that force to act, it means that this person must have an energy which he has told that allows him this force to act on that rod and this bucket is lifted. What does it mean? It means that a particular form of e...”
Electric Cells and Current Electricity
The lesson covers the types of electric cells, including primary and secondary cells. It explains the concepts of electromagnetic force, current electricity, potential difference, and resistance. The arrangement of cells in series and parallel is also discussed.
- 20:02 “That means if I move them like this, from this place, we have it moving out, going into this, we have this coming in, coming in, that is what, the positive charge body and the negative charge body. Now, we have the colum...”
- 00:49 “They cannot be recharged. And examples of it is Daniel C. and Liquid C. Now, we have the secondary cell, these are cell whose chemical reactions are irreversible. And that's why they are being recharged. Examples of it a...”
- 16:48 “Now, etching is carried out to neutralize this one, we have it to be, to be like this, we have positive, which is this, neutralizing the body, Now, bringing this, now, you remove your hand, which is what? The etching, re...”