September 28, 29 BBC

Do Now: [note: F = ma, where 1 N = 1 kg •m/s²]

Please consider this released STAR test question:

A student attempts to measure the mass of a brick by measuring the force required to accelerate it at 1 m/s² on a level surface. The force required is 2 N, and the student concludes that the brick has a mass of 2 kg. A balance shows that the mass of the brick is really 1.5 kg. The experimental error is most likely due to

A. gravity.
B. work.
C. friction.
D. inertia.

Agenda

1. Do Now
2. Introduction to Force and Motion
   
   
   
   1. Push or a pull
   2. Contact Forces
      
   3. Field Forces
   4. example
3. F = m•a, a = F/m
4. Introduction to inertia
5. Frames of Reference

Homework:

  Work on this worksheet

Agenda for September 21-22

Do Now:
Please consider this released STAR test question:

A student does an experiment to measure the acceleration of a falling object, which is 9.8 m/s². The student obtains an experimental value of 14.6 m/s². The reason for this variation is most likely due to

1. human error.
2. air resistance.
3. local fluctuations in gravity.
4. the mass of the object.

Announcement:

There will be a 45 minute peer-to-peer tutoring session at 3PM on Tuesday, in preparation for the Unit 1 Quiz on Thursday/Friday. Students will sign in, and receive 1 extra credit point. The quiz will contain materials from Chapters 1-3, as well as any other topics covered in class.

Agenda

1. Do Now
2. 5 Kinematics Formulas PPT
3. Homework presentations
4. Worksheet problems

Homework

p. 80 #68, 70; p. 81 #74, 78, 82