– Define speed as distance travelled per unit time using v=stv = \frac{s}{t}.- Define velocity as speed in a given direction.
Activities
– Starter (5 mins): Show examples of objects moving (e.g., a car and a runner) and ask: “How can we measure their motion?”- Main (25 mins): 1. Speed Formula: – Introduce v=stv = \frac{s}{t} (distance/time). – Students calculate the speed of a moving object using measured values. 2. Velocity: – Explain the difference between speed (scalar) and velocity (vector). – Provide examples (e.g., a car moving north at 60 km/h).- Plenary (10 mins): Students solve basic problems calculating speed and velocity.
Resources
Stopwatch, measuring tape, toy car, worksheets.
Time
40 minutes total: 5 mins (Starter) + 25 mins (Main) + 10 mins (Plenary).
Homework
Solve speed and velocity calculation problems (worksheet provided).
Assessment
Worksheet: Solve v=stv = \frac{s}{t} problems.
Past Paper Practice
IGCSE Physics 0625/12/O/N/20 Q2(a).
Lesson 2: Distance-Time and Speed-Time Graphs
Section
Details
Objective
– Sketch, plot, and interpret distance-time and speed-time graphs.- Determine motion states (e.g., at rest, constant speed, accelerating) from graphs.
Activities
– Starter (5 mins): Show a distance-time graph and ask: “What does this graph tell us about the object’s motion?”- Main (25 mins): 1. Distance-Time Graphs: – Discuss how slope indicates speed. – Interpret flat, rising, and steepening slopes. 2. Speed-Time Graphs: – Discuss how slope indicates acceleration and area under the graph represents distance. 3. Practice: Students draw graphs for given scenarios (e.g., constant speed, accelerating, decelerating).- Plenary (10 mins): Students interpret sample graphs and describe the motion.
Resources
Graph paper, rulers, worksheets with sample graphs.
Time
40 minutes total: 5 mins (Starter) + 25 mins (Main) + 10 mins (Plenary).
Homework
Draw and interpret a distance-time graph for an object accelerating and decelerating.
Assessment
Worksheet: Analyze distance-time and speed-time graphs.
Past Paper Practice
IGCSE Physics 0625/42/M/J/20 Q3(b).
Lesson 3: Acceleration and Free Fall
Section
Details
Objective
– Define acceleration as change in velocity per unit time using a=ΔvΔta = \frac{\Delta v}{\Delta t}.- State that the acceleration of free fall is approximately 9.8 m/s29.8 \, \text{m/s}^2.
Activities
– Starter (5 mins): Drop two objects of different masses and ask: “Why do they fall at the same rate?”- Main (25 mins): 1. Acceleration Formula: – Define a=ΔvΔta = \frac{\Delta v}{\Delta t} (change in velocity/time). – Students calculate acceleration using given data. 2. Free Fall: – Discuss gravitational acceleration (g=9.8 m/s2g = 9.8 \, \text{m/s}^2) and its independence of mass. – Demonstrate free fall using a video (e.g., Apollo 15 feather and hammer drop).- Plenary (10 mins): Students solve acceleration problems and explain free fall observations.
Resources
Stopwatch, small objects of different masses, worksheets.
Time
40 minutes total: 5 mins (Starter) + 25 mins (Main) + 10 mins (Plenary).
Homework
Solve problems involving acceleration and free fall (worksheet provided).
Assessment
Worksheet: Calculate acceleration for given scenarios.
Past Paper Practice
IGCSE Physics 0625/12/M/J/21 Q4(c).
Lesson 4: Determining Resultant Motion from Graphs
Section
Details
Objective
– Calculate acceleration from the gradient of a speed-time graph.- Determine the distance travelled from the area under the graph.
Activities
– Starter (5 mins): Show a speed-time graph and ask: “What information can we calculate from this graph?”- Main (25 mins): 1. Gradient as Acceleration: – Explain how to calculate acceleration from the slope of a speed-time graph. – Students calculate gradients for sample graphs. 2. Area as Distance: – Explain how the area under the graph gives distance travelled. – Students calculate areas using geometric methods. 3. Practice: Students work on provided graphs to calculate acceleration and distance.- Plenary (10 mins): Students summarize the steps for analyzing speed-time graphs.
Resources
Graph paper, worksheets with sample graphs.
Time
40 minutes total: 5 mins (Starter) + 25 mins (Main) + 10 mins (Plenary).
Homework
Solve problems calculating acceleration and distance from speed-time graphs.
Assessment
Worksheet: Analyze speed-time graphs for acceleration and distance.
Past Paper Practice
IGCSE Physics 0625/42/O/N/20 Q3(a).
Key Notes for Students:
Speed and Velocity:
Speed: v=stv = \frac{s}{t}.
Velocity: Speed in a specific direction.
Graphs:
Distance-Time: Slope = speed.
Speed-Time: Slope = acceleration, Area = distance.
Acceleration:
a=ΔvΔta = \frac{\Delta v}{\Delta t}.
Free fall acceleration: 9.8 m/s29.8 \, \text{m/s}^2.
Notes for Teachers:
Use hands-on experiments to engage students in learning about motion.
Relate motion concepts to real-life examples (e.g., vehicle speeds, sports).
Provide clear explanations and step-by-step methods for graph analysis.
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