# HP Cycle 21*

## 1/14 - 1/20 F 1/14 T 1/18 W 1/19 Th 1/20

### 🟢 6: F 1/14 virtual, 🔵 8: T 1/18 - projectile motion intro

Today, we’ll start looking at projectile motion. We’ll start by looking at projectiles launched horizontally. We’ll discover that projectiles move at constant velocity in the horizontal direction where there’s no net external force, whereas they move with constant acceleration (g) in the vertical direction where the external force is due to gravity. (Air resistance is ignored.) In order to solve projectile motion problems, we often split the problem into x- and y-components, and then combine x & y with time. We'll work through this Projectile Motion PowerPoint through at least Example 1.

Presentation: Projectile Motion PowerPoint

Homework: For more support, watch the following two videos by Dan Fullerton. They are both on projectile motion. Watch only the first 11 minutes of the first video, and watch the entire second video. The second video contains examples which you need to work through alongside Mr. Fullerton.

### 🟩 6: T 1/18, 🟦 8: W 1/19 virtual - projectile motion range equation

Today, we'll continue the Projectile Motion Presentation by starting to look at projectiles launched at an angle. We'll look at a special case of a projectile that is caught at the same height as it was launched. We'll get through at least examples 2 & 3 in the Projectile Motion PowerPoint. On an assessment, you will need to write out the whole derivation. Do NOT start with the range equation. Watch this video if you want to see the derivation again.

Optional Extra Practice: Projectile Motion CompuSheets page 1 (Solutions). Chapter 3 #44, 45, 46, 49, 50, 54 (Solutions)

### 💚 6: Th 1/20, 💙 8: Th 1/20 - ➕ Positive Physics projectile motion problems

Today, we'll be practicing what you have learned previously about projectile motion. Do ➕ Positive Physics "work" problems from unit 4: projectile motion:

• preparation problems

• complete problems 1

• complete problems 2

Homework: Above ➕ Positive Physics unit 4 problems due Sunday at 10pm. Only completion score will count, so keep trying the problems until you get them correct. No late work will be accepted.

Optional Extra Practice: Projectile Motion CompuSheets page 1 (Solutions). Chapter 3 #44, 45, 46, 49, 50, 54 (Solutions)