Go to: Course homepage, Lectures

Lecture: 22 (iq19)

1. Concept of potential energy.

2. Potential energy of m due to gravitational force of the earth.

3. From potential energy to the force

4. Example determine the mass of the asteroid

5. Determine the kinetic energy from conservation of energy

o Attractive case

o Repulsive case

Announcement:

1. Midterm2: Class average 60%.

2. Reminder: Determine the letter grade you made for this exam.                

Use the percent-score cutoff and the scaled score cutoff to determine your letter grades.  

o ps-letter grade

o ss-letter grade. 

If your two letter grades are different, the better of the two is the letter grade you have made for this exam.  

3.  You should work through all the problems you have missed (do not consult the explanations if possible). If you did not do as well as you had expected, you are welcome to see me to discuss your exam performance and look for ways to improve your study habit.

4.  Also consult Matt, and talk to the LAs.