FOR INSTRUCTORS · MODULE 06 · UNIT 1 · ELECTROSTATICS

Build a Solve it problem

Set up the situation in the picture: drag the charges where you want them and give each a value. The problem text, the knowns and unknowns, and the solution blocks (with common mistakes and their feedback) are written for you.

Visual builder

Start from

Problem type

📂 Load problem file (.json format)

The situation

Drag, or select and use arrow keys

How many charges

Selected charge

Charge q₁ +3.0 μC

−10 μC+10 μC

x (m) y (m)

Find the net force on Origin of the coordinates at Also ask for the force on the other charge (Newton’s third law) Charge q₃ to place μC

What students get

Title Problem statement

Answers from the electrostatics engine

Step 1 · Knowns and unknowns

Step 2 · Solution steps ✓ correct block · ✗ common mistakes (open one to read its feedback)

Student link (paste into Canvas)

The builder writes every number from Coulomb’s law with k = 8.988 × 10⁹ N·m²/C² (the problem text quotes 8.99 × 10⁹). Charges snap to 1 cm and must be at least 4 cm apart. Your draft is kept in this browser only; nothing is uploaded. The student link carries the whole problem, so it works anywhere the lab is hosted.