Uniform Rectilinear Motion

🎯 Class Objective:

The student classifies and organizes motion concepts hierarchically (position, distance, displacement, speed, velocity) to prioritize correct interpretation of movement situations.

🧠 A. Distance vs Displacement (reasoning)

A student walks: 5 m North, then 3 m South, then 4 m North.

• Total distance traveled = ?

• Final displacement (m and direction) = ?

• Can distance be equal to displacement? When? Explain.

• Can displacement be negative? What does it mean?
  
  

🚶 B. Uniform Rectilinear Motion (URM)

Use URM idea: straight line + constant speed.

Classify each situation as URM or Not URM and explain why (1 line each):

• A bus moves straight at constant 15 m/s for 10 minutes.

• A motorcycle moves in a straight road but keeps braking and accelerating.

• A person walks straight at constant speed for 100 m.

• A satellite moves in a circular orbit at constant speed.
  
  

⚡ C. Compute Speed (with unit conversions)

1. A cyclist travels 900 m in 60 s.

   • Find speed in m/s

   • Convert to km/h

2. A car travels 2.4 km in 2 minutes.

   • Find speed in m/s

3. A turtle moves 50 cm in 25 s.

   • Find speed in m/s

4. A runner moves at 8 m/s.

   • Convert to km/h

📊 D. Answer based on the text (graph reasoning without drawing)

📍 Position–Time Situations

1. An object moves from 0 m to 20 m in a straight line at constant rate.

   • What type of motion is this?

   • Is the speed constant or changing?

2. An object stays at the same position for 10 seconds.

   • What is happening to its motion?

3. An object moves forward, stops, then goes back to the starting point.

   • What happens to displacement?