NGSS crankshaft AR

Scan the QR code to open the crankshaft AR in your own space!

Explore the basics of mechanical motion with our NGSS Crankshaft AR model. This interactive tool demonstrates how rotational motion is converted into linear motion, using a crankshaft as a real-world example. Students can observe the parts of the crankshaft and understand how they work together to transfer energy. By exploring this model, students will grasp fundamental concepts like motion, energy transfer, and mechanical systems in an engaging and accessible way. Perfect for introducing physics and engineering principles, this AR experience brings hands-on learning to life.

 

Classroom questions

  • Mechanical Motion: How does the rotational motion of the crankshaft convert into linear motion? Can you identify the key parts of the crankshaft responsible for this conversion?

  • Energy Conversion: What forms of energy are involved in the crankshaft’s operation? How is rotational energy transformed into linear energy in the system?

  • Efficiency and Design: How do the size and shape of the crankshaft parts influence its efficiency? What would happen if one component were larger or smaller?

  • Forces and Motion: How do the forces acting on the crankshaft change as it rotates? At what points in the cycle do you think the forces are the greatest?

  • Real-World Applications: Can you think of examples where crankshafts are used in everyday machines? How do these devices rely on the physics principles demonstrated in the AR model?

  • System Interactions: What happens to the linear motion if the crankshaft rotates at different speeds? How might this affect a machine connected to the crankshaft?

 

Classroom Activities

1. Hypothesis Testing: Exploring Motion Conversion

  • Activity: Before interacting with the AR model, have students hypothesize how the crankshaft converts rotational motion into linear motion. Then, using the AR model, students observe the mechanism and compare their predictions.

  • Objective: Understand how motion is transferred and transformed in a crankshaft system.

  • Discussion: Students share their observations, highlighting parts of the crankshaft responsible for the motion conversion.

2. Energy Flow Mapping

  • Activity: Ask students to observe the AR model and sketch the energy flow. They should identify and label where rotational energy starts, how it is transferred through the crankshaft, and where linear energy emerges.

  • Objective: Visualize energy transformation in mechanical systems.

  • Extension: Students hypothesize what might happen if the energy transfer were less efficient (e.g., due to friction or wear).

3. Variable Exploration: Speed and Motion

  • Activity: Have students manipulate the speed of the crankshaft in the AR model (if adjustable) or discuss how changing rotational speed might impact linear motion. Students can predict and describe the relationship between speed, force, and energy.

  • Objective: Explore how changes in input affect system behavior.

  • Discussion: How does increasing the crankshaft’s speed impact the connected system in real-world applications like engines?

4. Real-World Connections: Machine Design

  • Activity: Challenge students to research real-world applications of crankshafts (e.g., car engines, bicycles). Then, using the AR model as inspiration, have them sketch or digitally design a simple machine that incorporates a crankshaft, explaining how it works.

  • Objective: Connect classroom learning to real-world engineering.

  • Presentation: Students present their designs, highlighting how the crankshaft aids in energy transfer and motion.

5. Cause and Effect: Impact of Crankshaft Shape

  • Activity: Pose a question: "What would happen if the crankshaft arms were longer or shorter?" Have students analyze the AR model to hypothesize how the shape affects the motion. Students can discuss scenarios in small groups and record their predictions.

  • Objective: Understand how design modifications impact mechanical performance.

  • Discussion: Discuss the importance of crankshaft design in optimizing energy efficiency in machines.

6. Collaborative Design Challenge: Crankshaft Experiment

  • Activity: In groups, have students create a paper or 3D-printed prototype of a crankshaft-inspired system, using the AR model as a guide. They should identify the parts and explain how their design mirrors the motion conversion shown in the AR model.

  • Objective: Apply theoretical knowledge to a creative, hands-on project.

  • Outcome: Groups showcase their prototypes and discuss potential real-world applications.