# AT Cycle 7

## 10/15-10/20

F 10/15

M 10/18

T 10/19

W 10/20

### π΄ 1: F 10/15, π‘ 3: F 10/15 - static equilibrium problems

Daily check-in: basic torque and static equilibrium

Today, we'll try the Hard Torque Problems for practice with static equilibrium. We will continue working on these next hour as well.

1. T3 = 250N, m = 40kg
2. T2 = 3700N, Fhy = 2350N down, Fhx = 1850N right
3. T2 = 600N, Fhx = 520N left, Fhy = 50N up
4. T1 = 289N, Fhx = 289N right, Fhy = 350N up
5. Fwall = 727N, Ff = 727N, Fground = 1230N
6. 51.3 degrees (there's a typo, it should say "minimum angle")

Homework: Work on completing Hard Torque Problems due to βοΈ Google Classroom by Tuesday, October 19th at 10pm. Watch the video below before class on Friday, October 22nd. Might be review for some of you. If this is new to you, perhaps consider watching this video multiple times before next week. QUIZ on static equilibrium problems on Thursday, October 21st

### π₯ 1: T 10/19 lab, π¨ 3: M 10/18 lab - ladder lab (1)

Daily Check-in: Line of action method

Today, we'll start class by going over the line of action method of solving problems. We'll finish up the Hard Torque Problems from last lesson.

Lab Safety: During our ladder lab, we will be leaning a model of a ladder up against a wall and sometimes hanging masses off the ladder. The ladder may be in a precarious position, so please make sure not to place your hand under the ladder, as the ladder could slide and fall on your hand or fingers. Also, since you are using masses, be careful that the masses do not fall off the table as that could cause injury if they land on someone. Don't attempt to climb a ladder at home without supervision.

Homework: Finish creating your mathematical models on page 1 of Ladder Lab if you have not already done so. We can test your models next time. Make sure you've completed Hard Torque Problems due to βοΈ Google Classroom by Tuesday, October 19th at 10pm.