Physics 1135 (Engineering Physics I)

Lecture 14: Gravitational potential energy and space travel

Objectives: In this lecture, students will learn to
  • derive a potential energy for the force of universal gravitation
  • graph the potential energy and use it to interpret motion with different total mechanical energy
  • apply the concept of energy conservation to space travel problems
  • explain the escape condition and derive an expression for the escape speed
  • derive an expression for the total mechanical energy of a satellite in orbit
Lecture Notes: Videos:

Introduction lec14_1.mp4
Potential energy lec14_2.mp4 with captions
Potential energy diagrams lec14_3.mp4 with captions
Escape speed. Examples. lec14_4.mp4 with captions
Example: orbital energy of a satellite lec14_5.mp4 with captions
Example problem: multiple objects lec14_6.mp4 with captions


Additional example problem Video.mp4 with captions
For your interest:
Gravity visualized
Link to youtube

Homework assignment: HW #14