Science · Year 10

Active learning ideas

Friction and Air Resistance

Active learning works for this topic because students need to feel and measure friction directly and see air resistance in action. These forces are invisible until students manipulate materials and collect data. The hands-on activities turn abstract forces into concrete experiences that anchor later conceptual discussions.

• ACARA Content Descriptions
• AC9S10U07

• 35–50 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Experiential Learning
• 45 min · Small Groups

Ramp Investigation: Static vs Kinetic Friction

Provide wooden ramps and blocks with different surface treatments like sandpaper or oil. Students measure the angle needed to start motion (static) and maintain sliding (kinetic), recording data in tables. They plot friction force against normal force using spring scales.

What causes friction between surfaces , and why is static friction typically greater than kinetic friction?

Facilitation Tip

During Ramp Investigation, remind students to clean the ramp surface between trials to remove dust that can change friction results.

What to look for

Present students with a scenario: 'A box is at rest on a rough surface. You push it gently, and it doesn't move. You push harder, and it starts to slide.' Ask students to identify which type of friction is acting in each phase (at rest, pushing gently, sliding) and explain why the force needed to start motion is greater than the force needed to keep it moving.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

Activity 02

• Experiential Learning
• 35 min · Pairs

Parachute Challenge: Air Resistance

Students cut parachutes from plastic bags in varied sizes and drop weighted cups from a fixed height. They time descents and calculate terminal velocities. Groups redesign parachutes to test drag effects and present findings.

How do friction and air resistance change the way objects move , and what happens when these forces balance the driving force?

Facilitation Tip

For Parachute Challenge, ask students to predict how adding weight will affect descent time before they test, then compare predictions to data.

What to look for

Pose the question: 'Imagine you are designing a new type of shoe for athletes. What factors related to friction and air resistance would you consider to improve performance, and why?' Facilitate a class discussion where students share their ideas and justify their design choices.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

Activity 03

• Experiential Learning
• 50 min · Small Groups

Surface Drag Test: Friction Coefficients

Set up a flat track with surfaces like carpet, glass, and wax paper. Pull toy cars with a Newton meter at constant speed, noting force readings. Students compute coefficients and discuss engineering implications.

In what situations do engineers want to maximise friction and in what situations do they want to minimise it , and how do they achieve each?

Facilitation Tip

In Surface Drag Test, have students mark their block’s starting position with tape to ensure consistent measurements across trials.

What to look for

Give each student a small card. Ask them to draw a simple diagram of a car and an airplane. On the car, they should label one way engineers minimize air resistance. On the airplane, they should label one way engineers maximize friction for safe operation.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

Activity 04

• Experiential Learning
• 40 min · Individual

Streamliner Design: Minimising Resistance

Provide modelling clay and straws for students to shape vehicles. Roll them down ramps into a 'wind tunnel' of fans, measuring distances. Iterate designs based on air friction observations and group votes.

What causes friction between surfaces , and why is static friction typically greater than kinetic friction?

Facilitation Tip

During Streamliner Design, provide only basic materials so students focus on shape and angle rather than decoration or extra features.

What to look for

Present students with a scenario: 'A box is at rest on a rough surface. You push it gently, and it doesn't move. You push harder, and it starts to slide.' Ask students to identify which type of friction is acting in each phase (at rest, pushing gently, sliding) and explain why the force needed to start motion is greater than the force needed to keep it moving.

• Apply
• Analyze
• Evaluate
• Self-Awareness
• Self-Management
• Social Awareness

A few notes on teaching this unit

Teach this topic by starting with simple experiences before introducing vocabulary. Students need to observe friction and air resistance firsthand to build accurate mental models. Avoid starting with formulas or definitions, as these concepts are counterintuitive for many. Research shows that students who manipulate materials and discuss observations develop deeper understanding than those who only listen to lectures or watch demonstrations.

Successful learning looks like students accurately measuring friction differences, explaining why static friction is greater than kinetic friction, and applying air resistance concepts to design solutions. They should justify their choices with data and relate surface texture to motion control in real-world contexts.

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Watch Out for These Misconceptions

• During Ramp Investigation, watch for students who assume friction always makes motion harder. Redirect them by asking, 'How did the rough surface feel when you tried to slide the block by hand?' to connect texture to grip and control.

  During Ramp Investigation, have students feel the difference between surfaces with their hands, then measure how much force is needed to start and keep the block moving. Ask them to explain why the rough surface might be useful for walking or driving.

• During Ramp Investigation, watch for students who think static and kinetic friction require the same force. Redirect them by asking, 'What did the spring scale show when the block first started moving compared to when it was already sliding?' to highlight the difference in force values.

  During Ramp Investigation, guide students to graph their force measurements for static and kinetic friction. Ask them to explain why the starting force is always higher and how this relates to the need for extra effort to begin motion.

• During Parachute Challenge, watch for students who believe air resistance only affects fast-moving objects. Redirect them by asking, 'Did your small parachute drop faster than the larger one even at slow speeds?' to show drag at low velocities.

  During Parachute Challenge, have students time small and large parachutes from the same height. Ask them to explain why the larger parachute descends slower even when dropped gently, linking surface area to air resistance.

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Methods used in this brief

• Experiential Learning