Author: Lee Trampleasure

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11/19: Answers to Earth Structure and Density Quiz

Quiz corrections are due on Thursday, 11/21. You must completely write out each problem you got wrong–both the question and all the answers–in order to get credit.

Remember that your version letter is bubbled in at the bottom, so if you can see the letter B, that means you have version A, and if you can see the letter A, you have version B.

Version AProblem #Version B
D1D
BCD2B
B3D
B4B
ABC5ABC
D6BCD
B7B
A8D
AB9A
D10AB

The bonus point on this quiz was bubbling in D for number 15.

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11/18 Answers to Force and force diagrams quiz

Quiz corrections are due on Wednesday. You must completely write out each problem you got wrong–both the question and all the answers–in order to get credit.

Remember that your version letter is bubbled in at the bottom, so if you can see the letter B, that means you have version A, and if you can see the letter A, you have version B.

Version AProblem #Version B
AB D1AB D
AB D2B
B3AB D
B4B
C5C
B6C
C7B
A8A
A9D
D10A

The bonus point on this quiz was bubbling in your student ID, as stated in the instructions.

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11/18: Reviewing forces and plate tectonics

Warm up

A force is a ________________ between to objects or systems of objects.

Textbook review

  • 15 minutes: Read/skim through the pages below on your own, taking notes as you go (including questions you are not sure of). Include sketches!
  • 25 minutes: With your group, review your notes, sharing and adding to your notes.
  • You will get credit for your notes: 1 page = C; 1-2 pages = B; 2-3 pages = A
  • Forces: Pages 356-364 & 370-371
  • Plate tectonics: Pages 676-683

Exit ticket

Name the properties needed for each of the following two forces that act at without contact: Gravity and electromagnetic.

Answers to warm up and exit ticket

  • A force is an interaction between two objects.
  • Gravity requires objects to have mass (which all objects have!) and electromagnetic force requires objects to have charge (positive or negative).

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11/15 Quiz on forces; homework

  • You will be able to use the green AP Physics 1 equation sheet for the quiz.
  • You will need a scientific calculator.
  • The quiz consists of two problems, one on each side of the sheet.

To prepare for next week’s test, be sure to review the video tutorials here.

If you don’t have a scientific calculator by the test next week, I will be happy to provide you with a table of trigonometric identities and teach you how to use it (I guess I’m a dinosaur–this is how I learned to do SOHCAHTOA, and we didn’t call it that).

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11/15: Quiz on Forces and force diagrams

Due today:

  1. Bookends for the week
  2. Drawing force diagrams worksheet
  3. Any notes from yesterday’s Kahoot! (if you took them).

Please staple these together in the order show above.

Warm up

When drawing force diagrams, how do you decide to draw your arrows?

Today’s agenda

  1. Complete the warm up, including listing three things you learned this week. Write one complete sentence for each.
  2. 15 minutes for questions before the quiz.
    • Work with your group to develop three questions you want answered, listed by priority (5 minutes).
    • We will go around the room and each table will be able to ask one question and have it answered (10 minutes).
  3. Quiz on forces and force diagrams.

Warm up answer

  • The length of the arrow corresponds to the strength of the force, so stronger forces get longer arrows.
  • The arrowhead shows the direction of the force.
  • The arrow always starts on the dot )even if a force is pushing the object).
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19-11-14: A few force videos

Video list

The videos today are all from Flipping Physics.

  • Introduction to Free Body Diagrams or Force Diagrams
  • 5 Steps to Solve any Free Body Diagram Problem
  • A Three Force Example of Newton’s 2nd Law with Components
  • AP Physics 1: Dynamics Review (Newton’s 3 Laws and Friction)

Remember that as you watch these videos, when a problem/question is presented, try writing out the answer before you continue with the video–then check yourself as you progress through the video.

Flipping Physics: Introduction to Free Body Diagrams or Force diagrams

Produced by Flipping Physics
Continue reading “19-11-14: A few force videos”
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19-11-14 Getting ready for forces quiz

Today’s assignment from textbook:

p. 110-112: 20, 37, 38, 39, 41 and 51.

What you need to know for tomorrow’s quiz:

  • Use of first five equations in your equation sheet
  • Draw force diagrams
  • Evaluate forces to determine balanced/unbalanced net force
  • Special circumstances/types of problems
    • Solve problems with pulleys (pulleys change direction of tension, not magnitude)
    • Solve problems with ramps
  • Solve problems with forces at angles
    • Break down forces into x and y components
    • Solve triangle math using SOHCAHTOA and law of sines

Additional resources

You an find instructional/tutorial videos here.