Physics · 5th Year

Active learning ideas

Changes in Speed: Getting Faster and Slower

Active learning builds conceptual bridges between abstract force ideas and observable motion. This topic asks students to trace unbalanced forces through real, measurable changes in speed. Hands-on trials make the invisible forces of friction and gravity tangible, so students can test predictions and refine explanations through direct evidence.

• NCCA Curriculum Specifications
• NCCA: Primary Curriculum - Science - Energy and Forces

• 30–45 min
• Pairs → Whole Class
• 4 activities

Activity 01

• Experiential Learning
• 45 min · Small Groups

Ramp Challenges: Speed Variations

Build ramps from books at three angles. Release identical balls or cars from the top, observe and time speed changes. Switch to rough surfaces for slowing effects, then discuss forces involved.

Describe what happens to the speed of a ball rolling down a hill.

Facilitation Tip

During Ramp Challenges, circulate with a timer and ask each group to predict where they expect the ball to be fastest, then compare predictions to their stopwatch measurements.

What to look for

Provide students with three scenarios: a car starting from a stoplight, a ball rolling to a stop, and a bicycle moving at a constant speed. Ask them to write 'speeding up', 'slowing down', or 'constant speed' for each scenario and briefly explain why.

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

Activity 02

• Experiential Learning
• 35 min · Pairs

Toy Car Tracks: Acceleration Stations

Set stations with straight tracks, inclines, and curves. Students push cars gently, note speeding up or slowing, and record descriptions. Groups compare results and vote on best examples.

Give examples of things that get faster and things that get slower.

Facilitation Tip

For Toy Car Tracks, assign each station a different surface material and have students rotate in teams, timing runs and ranking surfaces by deceleration.

What to look for

Ask students to stand up and demonstrate 'speeding up' with their hands and 'slowing down' with their hands. Then, call out an object (e.g., 'a dropped apple', 'a skateboarder braking') and have them show the correct motion.

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

Activity 03

• Experiential Learning
• 30 min · Small Groups

Outdoor Motion Hunt: Real-World Observations

Students walk school grounds noting speeding up (e.g., downhill runs) and slowing (e.g., against wind). Sketch paths, describe changes, and share photos in class debrief.

How can you make a toy car go faster or slower?

Facilitation Tip

On the Outdoor Motion Hunt, give students clipboards with a simple chart so they can sketch and label real-world examples of speed changes they observe.

What to look for

Pose the question: 'Imagine you are pushing a shopping cart. What would make it speed up? What would make it slow down? What would make it stop completely?' Facilitate a class discussion, guiding students to use terms like force, friction, and pushing.

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

Activity 04

• Experiential Learning
• 40 min · Whole Class

Video Slow-Motion Analysis: Braking Bikes

Show bike braking videos in slow motion. Pause to predict speed changes, then measure frame-by-frame. Students draw force diagrams based on visuals.

Describe what happens to the speed of a ball rolling down a hill.

Facilitation Tip

When using Video Slow-Motion Analysis, pause the clip at key frames and ask students to sketch velocity arrows above the bike to show changes in speed.

What to look for

Provide students with three scenarios: a car starting from a stoplight, a ball rolling to a stop, and a bicycle moving at a constant speed. Ask them to write 'speeding up', 'slowing down', or 'constant speed' for each scenario and briefly explain why.

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

A few notes on teaching this unit

Start with concrete motion examples students already know, like braking in a car or rolling a ball. Avoid abstract force diagrams early; instead, let students feel and measure real forces first. Research shows that pairing prediction with measurement builds stronger mental models than demonstrations alone. Use peer discussion to surface misconceptions before formal instruction, so students revise ideas through evidence rather than teacher explanation.

Students will confidently use terms like acceleration, deceleration, friction, and unbalanced forces to explain why objects speed up, slow down, or keep moving. They will design simple experiments, record data, and justify their conclusions with clear evidence from their trials.

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Watch Out for These Misconceptions

• During Ramp Challenges, watch for students assuming the ball slows down on its own after leaving their hands.

  Set up a prediction table on the board labeled 'What will happen when the ball is released?' and ask groups to write their reasoning. After trials, revisit the table to replace 'it slows down' with 'friction and air resistance act against the ball's motion' based on their measurements.

• During Toy Car Tracks, watch for students believing a continuous push is needed for speeding up.

  Ask each team to start their car with a gentle push and then release it. Have them note where the car speeds up (on the ramp) and where it slows down (on carpet), then explain the role of gravity and friction using their data.

• During Outdoor Motion Hunt, watch for students attributing all slowing to air resistance.

  Bring students back to a classroom surface station and have them test how different materials (carpet, tile, sandpaper) affect a toy car’s motion. Discuss why friction dominates on surfaces compared to air resistance in still air conditions.

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Methods used in this brief

• Experiential Learning