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Lecture 9: 

Newton’s laws of motion:

  • The first law
  • The second law: F=ma
    • Weight
    • F=F1+F2
  • The third law

 

Applications of F=ma

  • Elevator problems
  • String tension, pulley
  • Pushing two blocks (no friction case)

 

Reminder:

  • Only Iclicker ID is  registered (under my profile),  will the system be able to save the participation record.  
  • Midterm 1 is at  JES A121A, 7pm tonight. Be there by 6:50pm
  • Selected points on the exam format:

·         All multiple choices.  Level of difficulties include easy, medium, medium-hard questions.  Each question with 10points. For a given question, make sure you have read all possible choices (sometimes a few answers are printed on the next page) before answering it.

·         Our exam grading policy: No-penalty for wrong answer. If you do not know an answer, it is to your advantage to guess an answer.

·         Please use the course summary sheet (the formula sheet) when your review for the exam. We will be glad to answer your questions on the sheet except during an exam. At the exam, a fresh copy of the sheet will be distributed to you.

·         No crib-note cards will be allowed.

·         Programmable calculator may be used during an exam. However, its memory needs to been cleared before using it.