2026–27 · Backup lesson · Spring 2027
Choose a Mechanical Advantage for a Garden Job
Adult extension of: Simple Machines in the Garden
Unscheduled alternative · available resource
Compare a small load moved directly with the same load moved along a secured ramp. Relate the result to garden carts and levers while practicing a realistic plan that reduces strain without promising that tools eliminate effort or risk.
Curriculum skill focus: Force, tool use, functional problem-solving, gross-motor planning
01 · Learning
Objectives
- Identify a ramp as an inclined plane and recognize another simple-machine example.
- Compare effort and travel distance in a controlled small-load task.
- Select a safer tool or ask for assistance when the task exceeds personal limits.
02 · Preparation
Materials
Lightweight stable load with handle; low platform; secured wide ramp with side guides if needed; small wheeled cart or model; optional appropriate force gauge; tool photographs; tape measure; recording sheet.
03 · Practice
Adult project
- 1
Select a garden job such as moving a small bag onto a low bench. Agree on a comfortably manageable demonstration load and a stop signal; direct lifting is optional, and no one must prove their strength.
- 2
Examine the direct route and the ramp route to the same low height. Predict which might require less force at one time and which involves moving the load a longer distance.
- 3
Demonstrate the direct move with an appropriate helper, or use supplied force data if lifting is unsuitable. Record the method and any measurement rather than treating a participant’s discomfort as data to be repeated.
- 4
Secure the ramp and move the same load slowly along it while keeping hands clear of edges and wheels. Compare force-gauge readings if available, or use a clearly subjective effort description without calling it an exact measurement.
- 5
Compare distance as well as effort and identify friction or wheel effects. Look at a garden lever or wheelbarrow photograph and locate the load, support, and applied effort without using sharp tools as force experiments.
- 6
Create a practical plan naming the tool, route, load limit, and assistance needed. Check for slopes and obstacles, put equipment away, and state that choosing help or a smaller load is a valid solution.
Evidence & interpretation
What the investigation shows
Simple machines can change the size or direction of force. An ideal ramp lowers the force needed over a longer distance; it does not reduce the total work required to raise the load, and friction adds work in real systems.
Practical connection
Why this work matters
Simple-machine ideas support thoughtful use of ramps, carts, and handled tools during routine garden work.
Participation by choice
Individual access options
- Direct a partner’s movement or compare measured demonstration data instead of lifting or pushing.
- Use a tabletop model, broad handles, or a seated planning role with a clear view of the route.
- Choose a self-set load and pace, decline resistance or body-effort comparison, and signal stop without explanation.
Review & transfer
Reflect on the work
- What was traded for the lower force along the ramp?
- What would you check before using the same idea with a real garden load?