# HP Cycle 17

## 12/15 - 12/20

W 12/15

Th 12/16

F 12/17

M 12/20

### π’β 6: W 12/15, π΅β 8: W 12/15 - adding vectors

Lab quiz on Y-Tension problem TODAY!

After the quiz, we'll see how we can add vectors that are not at right angles to each other. We will think about adding force vectors when the object is not in equilibrium. We will have to utilize our skill of breaking vectors into x- and y- components.

Then, we'll do Chapter 3 Problem #29 from your textbook. With any time remaining, you'll start the β Positive Physics problems in the next post.

Homework: If you'd like to review more on vector addition, you can watch these videos:

(reposted):

For the example in the next video, imagine that two people are pulling on an object placed at the origin. The red person pulls with a force of 6.32N at an angle of 18.4 degree, while the blue person pulls with a force of 5.66N at 45 degrees.

The goal is to find the resultant force. In other words, instead of two people pulling in different directions, if there were one strong person who could exactly replicate the net force on the object, with what magnitude and direction of force would the strong person exert on the object to get the exact same result? Start this problem by first drawing a picture and by then finding the x- and y-components of each of the force vectors. Then watch the video below.

### π© 6: F 12/17, π¦ 8: Th 12/16 - β Positive Physics adding vectors

Today, we'll practice vector problems with β Positive Physics "work" problems from unit 8: diagonal forces (8 problems total):

• complete problems 2

• complete problems 3

• challenge

Optional Extra Practice: Chapter 3 #22, 26, 38, 43 on vector addition. Solutions.

Homework: All problems are due Friday night at 10pm. Only completion scores count, so try the problems till you get them right. No late work will be accepted. QUIZ on Vector Addition on Tuesday, December 21st!

### π 6: M 12/20, π 8: F 12/17 - β©οΈ Pivot inclined plane investigation

Today, we'll do a lab in β©οΈ Pivot Interactives called "Forces on Objects on a Ramp (short version) BCF." In this lab, you will investigate the components of force on an inclined plane. We'll extend the discussion to link to our inclined plane lab that we performed a long time ago. We'll talk about what factors affect the motion of an object on an inclined plane theoretically and in real life. Lab is due Wednesday at 10pm.

If you finish early, start the β Positive Physics problems in the next post.

Homework: QUIZ on Vector Addition next class - Tuesday, December 21st! Finish lab due Tuesday, December 21st at 10pm.