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Grade_9_Projectile_Motion_Enhanced_DepEd.pptx
- 1. Projectile Motion Grade 9Science | DepEd Curriculum
- 2. Learning Competencies • Describeprojectile motion qualitatively • Label parts of projectile motion • Describe projectile motion quantitatively
- 3. What is Motion? •Motion is the change in position of an object • It can be straight or curved • Projectile motion is a type of curved motion
- 4. What is ProjectileMotion? • Motion of an object thrown or launched into the air • Only gravity affects the motion (air resistance ignored) • Examples: thrown ball, kicked soccer ball
- 5. Key Idea • Horizontaland vertical motions are independent • Gravity affects only the vertical motion
- 6. Projectile Motion Diagram Trajectory Range MaximumHeight Vx (Horizontal) Vy (Vertical)
- 7. Horizontal Motion • Constantvelocity (Vx) • No horizontal acceleration • Same speed throughout the motion
- 8. Vertical Motion • Affectedby gravity • Acceleration is 9.8 m/s² downward • Velocity changes with time
- 9. Qualitative Description • Projectilemoves forward while falling down • Horizontal motion is uniform • Vertical motion is accelerated
- 10. Quantitative Description • Usesequations of motion • Horizontal and vertical motions are solved separately
- 11. Sample Problem 1 •A ball is thrown horizontally at 10 m/s. • How far will it travel in 2 seconds?
- 12. Solution • Given: Vx= 10 m/s, t = 2 s • Range = Vx × t • Range = 10 × 2 = 20 m
- 13. Sample Problem 2 •What happens to vertical velocity at maximum height?
- 14. Solution • Vertical velocitybecomes zero at maximum height
- 15. Quick Quiz • 1.What force affects vertical motion? • 2. Is horizontal velocity constant? • 3. What is the path of a projectile called? • 4. Where is vertical velocity zero? • 5. What motion is affected by gravity? • 6. True or False: Horizontal and vertical motions are independent
- 16. Quiz Answer Key •1. Gravity • 2. Yes • 3. Trajectory (parabola) • 4. At maximum height • 5. Vertical motion • 6. True
- 17. For Different Learners •Lower learners: Focus on diagrams and concepts • Average learners: Solve simple problems • Advanced learners: Analyze effects of angle and speed
- 18. Daily Lesson LogAlignment • Objective: Describe projectile motion • Materials: Slides, board, ball • Procedure: Motivation → Lesson → Practice → Quiz • Assessment: Quiz and oral recitation
- 19. Summary • Projectile motionhas horizontal and vertical components • Gravity affects only vertical motion • The path is a parabola
Editor's Notes
- #1 Introduce the topic using real-life examples such as throwing a ball.
- #2 Read and explain each competency. Emphasize that today’s lesson covers both concepts and simple problem solving.
- #3 Ask students to give examples of moving objects.
- #4 Stress that gravity acts downward only.
- #5 This is the most important concept in projectile motion.
- #6 Explain each labeled part: trajectory, range, height, Vx and Vy.
- #7 Relate this to uniform motion.
- #8 Compare this with free fall motion.
- #9 Ask students to describe the motion in their own words.
- #10 Tell students this will involve simple computations only.
- #11 Guide students to use distance = velocity × time.
- #12 Show step-by-step solution.
- #13 Encourage conceptual reasoning.
- #14 Reinforce the concept of upward and downward motion.
- #15 Let students answer orally or on paper.
- #16 Check and discuss answers.
- #17 Adjust questioning based on class ability.
- #18 This slide aligns the lesson with DepEd DLL format.
- #19 End with key takeaways.