How are there only 400 likes to these videos ? ? ? Excellent animations coupled with clear explanations. Rather than having completed equations just appear on the screen, I've discovered that graphics, animations, and equations need to be written out while they are being explained in order to help one grasp the meaning. This is one reason why it was so much easier to sit in class and go through a lecture with the teacher writing out steps on the board (preferably chalk, for some reason), instead of today's presentation of: Boom! completed solution! I think your mind needs the journey of hearing concepts, expecting an equation (chart, diagram, etc.) and then witnessing that fuzzy concept become solidified. I also really like the color differences. Though brief and not a complete replacement for the book and full lectures, they have clarified much of the material I'm going through. Can't say enough good stuff about these videos. I hope he does more ! ! !
4, the "vertical" leg divided by 5, the hypotenuse, = the cosine of F3(from the vertical axis). So the vertical component of F3 is 4/5 of F3. My prof has been emphasizing to use measurements when available instead of angles. The alternative would have been to calculate the angle (arccosine of 4/5) then using that angle in the calculation of components of F3.
5:48 why is the red line negative for sigma Ma? I thought the force trying to push the body counter clockwise should be positive? Edit: NVM, i figured it out. I imagined drawing a wall at the point of reference and assert the +/- sign in accordingly.
