Newton’s Laws: A Fairy Tale

Resources

Hello! On this page you’ll find resources that go along with my book Newton’s Laws: A Fairy Tale, the first book in the Fairy Tale Physics series.

Free Body Diagrams Worksheet + Answer Key

A picture of a worksheet with some illustrated practice problems

This would be a great worksheet to do after you’ve read the book.

I designed this worksheet so it starts with the basics but then goes through all the classic situations that trip people up when thinking about forces (like how gravity always points down or that two hockey pucks moving different directions can have the exact same diagram.

Download the Worksheet PDF

Phet Forces and Motion Basics

This is a fun simulation to play around with to see the relationship between individual forces, net force, and acceleration.

View Simulation on Phet Website
a screenshot of the phet website showing some stick figures having a tug of war pulling a cart

Exploratorium Activity: Spaghetti Accelerometer

an image of a hand holding a block with spaghetti and marshmallows attached to it. The caption reads 'Spaghetti Accelerometer, measure acceleration with spaghetti and marhsmallows'

The Exploratorium has a lot of cool hands-on activities you can do. I like this one because it’s a basic version of something our phones use all the time. Plus, I’m always looking for hands-on ways to get a more intuitive sense of acceleration. That’s always helpful for students.

See the Activity on the Exploratorium Website

Position, Velocity, Acceleration Maze!

This one doesn’t look like much, but I really love the Phet Maze activity. Position, Velocity, and Acceleration seem super simple, but there are important subtleties that everyone misses. This maze will help students build a better intuitive sense of each of these.

My suggestion:

  1. Leave ‘Practice’ selected. Click and drag the arrow around and watch what happens if r (position), v (velocity), and a (acceleration) are selected.

  2. Once you’ve got a good feel for it, select ‘Level 1’. Try to beat the maze with r, then with v, then with a. (Click ‘reset’ to restart the maze, and then ‘Start’.)

  3. Repeat for Levels 2 and 3! See how fast you can do it!

An image of a maze with some arrows and selector buttons for various levels
View the maze game on Phet

Phet Forces in 1 Dimension Simulation

This one’s a lot less pretty, but it’s got a great graphing feature if you want to get a bit more quantitative.

View Simulation on Phet Website
a screenshot of a computer window showing a stick figure on a graph next to a filing cabinet
a friendly inventor girl waves hello to you

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