Building Ramp Structures

Overview

In this lesson (Lesson 5 of 9), students investigate how ramps can change the motion of objects by reducing the effort needed to push or pull them. They will build simple ramp structures, test how different ramp angles affect how far and how fast objects travel, and represent their results in tables.

Learning intentions

WALT explore how forces act on objects and investigate how friction and gravity affect the motion of objects on ramps.

Success criteria

• I can build a ramp structure that is stable and safe.
• I can test the same object and method on my ramp and record observations.
• I can describe how changing the ramp angle affects how the object moves.
• I can use a simple table or graph to show patterns in my results.

Curriculum links

• AC9S4U03: identify how forces can be exerted by one object on another and investigate the effect of frictional and gravitational forces on the motion of objects
• AC9S4I02: construct and use representations (tables/column graphs/visual or physical models) to organise data and identify patterns
• AC9S4I01: pose questions, make predictions, and use observations to explain patterns
• AC9S4I02: plan and conduct a fair investigation by identifying variables and following safe equipment use

Lesson structure (45 minutes)

1. 0–5 min · Hook question. Teacher demonstrates two ramps (gentle and steep) with the same object and asks: “What do you predict will happen to the distance travelled and how it moves?” Students give a quick predicted reason using words like “slower/faster” and “grip/friction”.

2. 5–10 min · Mini teach: forces on a ramp. Teacher explains that gravity pulls objects down towards Earth and friction is the force that resists motion between surfaces; magnets may be mentioned only as past knowledge, but today focuses on ramps. Students repeat the idea: “gravity pulls down; friction slows it.”

3. 10–15 min · Plan and fair test check. Teacher shows the investigation scaffold for fair testing: same object, same release method, measure distance the object travels, change only ramp angle (or surface type if that’s chosen). Students write:

• Prediction (e.g., “Steeper ramp = farther/ faster”)
• Variables (what stays the same and what changes)

4. 15–30 min · Build ramps (structure first). Teacher distributes materials and models safe building (stable base, no sharp edges, gentle release). Students build a ramp with at least two angles (e.g., using different blocks/ledges) and test once without recording to confirm it is stable and repeatable.

5. 30–40 min · Record data with simple representations. Teacher sets a recording routine: 3 trials per angle, using a measuring tape/ruler and a clear start line. Students record: angle (degrees or “gentle/steep”), trial distance (cm), and a brief motion note (e.g., “slid,” “stopped quickly,” “sped up”). They enter results into a table and calculate an average distance for each angle.

6. 40–45 min · Share patterns and exit ticket. Teacher asks: “What pattern do you notice?” and “Why might friction change what happens?” Students share in pairs within the small group and complete a quick exit ticket: one sentence describing how ramp angle affected motion and one sentence linking to gravity or friction.

Resources

• Cardboard sheets or foam boards for ramps (one per group)
• Blocks/wooden wedges/bricks to change ramp angle
• Measuring tape or ruler, masking tape for start/finish lines
• Same set of objects (e.g., small toy cars, metal washers, wooden blocks, plastic balls)
• Data recording sheets (table template + optional bar/column graph template)
• Clipboards or hard-backed books
• Safety glasses (optional but recommended) and a clear testing space
• Markers and pencils
• Timer/stopwatch (optional for counting “how long to stop”)

Assessment

• During building and testing: teacher checks for fair test choices (what stays the same, what changes) and safe practices.
• Data accuracy check: teacher reviews tables for consistent units and clear start/finish measurements.
• Exit ticket: assesses understanding of how gravity and friction relate to observed motion.

Differentiation

• Support: sentence starters for predictions and explanations (e.g., “I predict that… because…” “Friction… so the object…”). Provide a ready-made variable chart and a partially completed data table.
• Support: offer a “measurement buddy” role so one student marks distances while another records observations.
• Extra challenge (students who finish early or need growth):
• Add a second variable by testing two ramp surface materials (paper vs fabric vs smooth plastic) while keeping angle constant.
• Create a mini “best ramp” optimisation: choose the ramp angle (and surface if allowed) that makes the object travel the greatest distance, and justify with their data.
• SEN/EAL: allow oral recording of observations first, then transcribe; use pictures/icons on the recording sheet (steep/gentle, farther/shorter).
• Enrichment: compare two different objects (e.g., ball vs toy car) and discuss why they may respond differently to friction.

Learning intentions and success criteria for this lesson (WALT/SCS)

• Students are learning to explore how ramps change the motion of objects by considering gravity and friction.
• Students can build and test ramps, record results in a table/graph, and explain patterns using scientific language.