About This Lesson

Welcome to Angled Forces, Rotated Systems, the second lesson in Unit 3: Linear Dynamics.

This lesson handles forces that act at an angle, including on inclined planes.

How to Use This Lesson

1. Watch the teaching video
2. Complete the worksheet
3. Check your answers
4. Use the worked video solutions for any problems you want to review step by step

Teaching Video

In this video, I explain how to use component vectors to assist with angled forces in force diagrams. I then discuss how rotating your coordinate system can be helpful with situations involving inclined planes and introduce three steps so that you always rotate properly.

Practice Materials

Use the resources below to practice the concepts from this lesson. Try to complete the worksheet on your own before checking the answer key.

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• Download Worksheet (3.02 Angled Forces, Rotated)
• Download Answer Key (3.02 Angled Forces, Rotated)

Worked Solutions

The videos below walk through each worksheet problem step by step.

Problem 1

Problem 2

Problem 3

Problem 4–6

Problem 7

Next Step
When you’re ready, continue to 3.03 Bal/Unbal/Fnet.