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Crooked Jaws

Force and Motion

Force and Motion

Crooked Jaws

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  • About
    • Who We Are
    • Contact Us
  • Energy Systems
    • Invent-a-Wheel
      • 1. How Can You Get It to Move?
      • 2. Playground
      • 3. Ramps and Sleds
      • 4. Surfaces and Friction
      • 5. Sled Redesign
      • 6. Let’s Roll
      • 7. Make A Car
      • 8. A Test Drive
      • 9. Car Facts
      • 10. Write a How-to Book
      • 11. Improve Your Ride
      • 12. The Auto Show
    • Fantastic Elastic
      • 1 What Is a Wind-up?
      • 2 Make a a Wind-up
      • 3 Troubleshoot Wind-ups
      • 4 Make a 2nd Wind-up
      • 5 Energy and Wind-ups
      • 6 Experiment on ! Toy Making Wheel size: Preparations
      • 7 Experiment on Wheel Size
      • 8 Experiment with Rubber Band
      • 9 Redesign and Decorate Wind-Ups
      • 10 Continue the Redesign
      • 11 How to Make My Wind-Up
      • 12 The Auto Show
      • How Could a Balloon Power a Car?
      • Make a Balloon Car
      • Troubleshooting Balloon Cars
      • How to Build a Balloon Car
      • How a Balloon Car Works
        • Balloon Car Troubleshooting Chart
    • ElectroCity
      • 1. Light & Sound
      • 2. Make a Switch
      • 3. Circuit Diagrams
      • 4. Motors
      • 5. Make a Simple ElectroCity
      • 6. Hidden Switches
      • 7. Vibrators and Noisemakers
      • 8. Things that Glow in the Dark
      • 9. Infrared Remotes
      • 11. Make an ElectroFying ElectroCity
      • 10. Design an ElectroFying ElectroCity
      • Present Your Electrocity
      • 13. The Digital Multimeter
    • EnerJeeps
      • 1. Turn a Motor On
      • 2. Make a Switch
      • 3. Circuit Diagrams
      • 4. Let’s Roll
      • 5. Make A Direct-Drive Or Friction Drive Car
      • 6. Troubleshooting A Direct-Drive Or Friction-Drive Car
      • 7. How To Build A Direct-Drive Or A Friction-Drive Car
      • 8. Make A Belt-Drive Or Propeller-Drive Car
      • 9. Troubleshooting And Redesign Of Belt-Drive & Propeller-Drive Cars
      • 10. Improve Your Ride: Add A Horn & Lights
      • 11. Gearing Up For The Auto Show
      • 12. The Auto Show
  • Force and Motion
    • Mech-a-Blocks
      • 1. What Can You Make?
      • 2. Structures and Mechanisms
      • 3. A Mechanism with an Input that Controls It
      • 4. Mechanism Diagrams
      • 5. Modeling Mechanisms
      • 6. Modeling Manufactured Mechanisms
      • 7. Which Way Will It Go?
      • 8. How to get a Better Ride
    • MechAnimations
      • 1. Identifying and Sorting Mechanisms
      • 2. Making Mechanisms
      • 3. Making One Link Control Another
      • 4. Representing Mechanisms
      • 5. Directions of Motion
      • 6. Combining Mechanisms
      • 7. Movement Around a Pivot
      • 8. How much do outputs move?
      • 9. Pegboard Models for MechAnimations
      • 10. Making a MechAnimation from a Pegboard Model
      • 11. Redesigning MechAnimations
      • 12. Presenting Mechanimations
    • Pop-ups
      • 1. Looking Closely at Pop-ups
      • 2. Make a Pop-up
      • 3. The Shape of a Pop-up
      • 4. Finding Patterns in the Folds
      • 6. Where Does it Hide?
      • 5. The Pop-up Computer
      • 7. Stair-step Pop-ups
      • 8. How they Move
      • 9. Make an Angle-fold Pop-up
      • 10. The Monster and the Inside-out Monster
      • 11. The Peek-a-Boo and the Hand-waver
      • 12. The Twister
  • Computers Unwrapped
    • Circuits
    • Codes
    • Information
    • Computation
    • Communication
    • Control
  • Kids Design and Make
    • Flip Toys
    • Make a Belt-Drive Car
    • Money Alarm
    • Sara and Lola’s Wind-up
    • Slide Switch and a Buzzer
    • Slippery Slide
    • Sub-systems for an Electric Car
    • Wind-Up Toy
  • Stuff That Works
    • Books
      • Designed Environments
      • Mechanisms & Other Systems
      • Signs, Symbols & Codes
      • Packaging and Other Structures
    • Professional Development Guide
      • Introductory Workshop
      • Half-day workshops
      • Guide for professional developers
    • Project Ideas
      • Packaging Bag-handle types
      • Advanced Mechanisms
      • How Shopping Bags Fail
      • Designed Environments
        • Chairs Up and Down
        • Hook Mania
      • A Story of Tape
        • Brainstorming Tape
        • Science & Technology of Tape
        • Scavenger Hunt for Tape
        • What is the best way to apply tape?
        • Which tape is best?
  • Blog
    • 5 Home STEM Projects
    • Mechanical Engineering For Kids
    • Variables
  • STEM at Home
    • 1. Flip Toys
    • 2. Parachutes
  • Gallery
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