6. Student Contributed Content

 

Formatting Guide

Hey everyone we're trying to keep everything as orderly as possible, which is probably a fool's errand. To stop things from getting too out of hand we ask

  1. Keep content you add to the appropriate section
  2. Arial font size 14
  3. On bullets. Post description of content - link to content.
  4. keep it clean...

Lecture Material and Videos

  • Mr. Andersen analyzes FBD's with example problems. He shows how to draw FBD's of various objects and includes all major forces acting on the object. 

- https://youtu.be/gDk2te4nrIo

  •   While taking a break much deserved break from midterms, three friends head to the local golf course to blow off some steam. Can you list the forces acting on the student in the red? Hint: Assume the grass has some coefficent of friction and our friend in the red is not accelerating.

​-https://www.youtube.com/watch?v=STJ9StNCVqE

Answer: If we draw a border around our friend in the red shirt, we can see many forces acting on him. First, he has a force of gravity acting on him. This force of gravity is the combined weight of he and his friend, times the acceleration due to gravity. Since he is not accelerating in the vertical axis, the normal force of the ground on our friend in the red is equal in magnitude to the force of gravity on our friend. On the horizontal axis, he has a force of friction acting on him from the grass resisting his change in motion, and a force normal from the golf cart pushing him forward. Once again, he is not accelerating in the horizontal direction so the force from friction is equal in magnitude to the normal force from the golf cart.

 

A helpful video when drawing free body diagrams:

https://www.youtube.com/watch?v=nDis6HbXxjg