You walk into an elevator, step onto a scale, and push the “up” button. You also recall that your normal weight is 625 N. Start answering each of the following questions by drawing a free- body diagram.

(a) If the elevator has an acceleration of magnitude 2.50 m/s2, what does the scale read?

(b) If you start holding a 3.85-kg package by a light vertical string, what will be the tension in this string once the elevator begins accelerating?

The quadratic formula is really useful, but its derivation is confusing to many. Like what is the point of “completing the square” anyway? In this video, I show how “completing the square” has a geometric interpretation–you are actually making the areas of two squares equal to each other! Blog post (text/image summary): http://wp.me/p6aMk-4kG You can…

If a vector has direction angles A=pi/4 and B=pi/3, find the third direction angle Y. Leave a tip for good service: https://paypal.me/jjthetutor Student Solution Manuals: https://amzn.to/2WZrFnD More help via http://jjthetutor.com Download my eBooks via http://payhip.com/jjthetutor, paperback via http://amazon.com/author/jjthetutor.

Though every problem in physics is different, a general three steps strategy is framed to solve a physics problem from any part of the subject. https://thepushkarsphysics.com/how-to-solve-a-physics-problem-an-advanced-strategic-approach/

Thanks to all of you who support me on Patreon. You da real mvps! $1 per month helps!! ðŸ™‚ https://www.patreon.com/patrickjmt !! Evaluating Trigonometric Functions at Important Angles, Ex 1. In this video, I show how to use the unit circle and reference angles to find some values for different trig functions.