Teacher Demonstration
Use the live model as a shared screen demonstration before students try their own predictions and observations.
Physics / Newtonian Mechanics
Threeslopespeed
Analyse Threeslopespeed as a Tracker video-analysis activity for kinematics, using position-time and velocity-time evidence to reason about acceleration.
1. Watch or Launch
Launch the Interactive
Open the simulation, adjust the controls, and compare what changes on screen before answering the concept-check questions.
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2. Big Ideas
Key idea On an inclined plane, weight can be resolved into components parallel and perpendicular to the slope. The parallel component drives motion along the slope, while the perpendicular component affects normal reaction and friction.
What Students Can Learn
- Resolve weight into components along and perpendicular to the plane.
- Connect steeper slopes to larger downslope components.
- Compare frictionless and frictional cases where available.
- Use acceleration evidence to test the force-component prediction.
Guiding Question
Which component of weight changes as the slope angle changes, and how does that affect the motion?
3. Try the Investigation
Start Shallow
Use a small angle and predict whether the object accelerates slowly or quickly.
Increase the Angle
Make the slope steeper and compare the acceleration or speed change.
Add or Compare Friction
If friction is available, compare motion with low and high friction at the same angle.
Explain by Components
Use parallel and perpendicular components of weight to justify the pattern.
4. Teacher Notes
Lesson Use
Use this as a bridge from vector resolution to motion; students should name the downslope component of weight.
Discussion Prompts
Ask: What happens to the normal reaction when angle increases? Which component causes acceleration along the plane?
Teaching Moves
Keep angle as the first independent variable, then introduce friction after the component pattern is clear.
5. Concept Check
These questions are generated from the topic and the concept illustrated by the simulation. Use them after students have explored the model.
Concept Score
Correct first attempts build a streak and unlock higher point multipliers on this device.
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Answer each question once to build your streak.
1. Which component of weight pulls an object down an inclined plane?
2. What usually happens to the downslope component of weight when the angle increases?
3. Which force is affected by the perpendicular component of weight?
4. Why compare two slope angles with the same object?
5. What should a good explanation include?
Expert Challenge
Unlocks after 3 correct concept-check answers on this page.
1. A car moves forward while its acceleration is negative. What is the best interpretation?
2. A velocity-time graph gets steeper but remains a straight line segment over a short interval. What does the steepness indicate?
3. Can an object have high speed and zero acceleration?
4. A bus speeds up from rest by equal velocity increases every second. What does that suggest?
5. What does acceleration in the same direction as velocity generally do?
7. Learning Pulse
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