Created from Youtube video: https://www.youtube.com/watch?v=ToymF8u6u4Uvideo

Concepts covered:Projectile motion, Grade 9 science, Horizontal motion, Vertical motion, Newton's second law

Grade 9 science lesson on projectile motion covers horizontal and vertical motions of a projectile, including concepts like Newton's second law of motion, uniform acceleration, and the effects of gravity on falling objects.

Table of Contents1.Projectile Motion: Horizontal and Vertical2.Uniform Acceleration in Motion3.Uniformly Accelerated Motion and Gravity4.Uniformly Accelerated Motion Analysis5.Projectile Motion: Understanding Horizontal and Vertical Components

chapter

1

Projectile Motion: Horizontal and Vertical

Concepts covered:Projectile Motion, Horizontal Motion, Vertical Motion, Newton's Second Law, Net Force

Explore the concepts of horizontal and vertical motions of a projectile in grade nine science, focusing on understanding the dynamics of projectile movement. Delve into Newton's second law of motion and the relationship between net force, object mass, and acceleration.

Question 1

What are the two motions of a projectile?

Question 2

What is the learning objective for the projectile motion topic?

Question 3

What does Newton's Second Law relate to?

chapter

2

Uniform Acceleration in Motion

Concepts covered:Uniform Acceleration, Net Force, Mass, Velocity, Constant Acceleration

The chapter discusses the concept of uniform acceleration in motion, emphasizing how the acceleration of an object is directly related to the net force applied and inversely proportional to its mass. It explores scenarios of constant acceleration, such as in the case of vehicles on the road.

Question 4

What does Newton's Second Law of Motion state?

Question 5

When is acceleration considered constant?

Question 6

How does a vehicle's acceleration change on highways?

chapter

3

Uniformly Accelerated Motion and Gravity

Concepts covered:Uniformly Accelerated Motion, Gravity, Acceleration, Free Fall, 9.8 meters per second squared

Objects in uniformly accelerated motion experience constant acceleration, as seen in free falling objects due to gravity. The acceleration due to gravity on Earth is 9.8 meters per second squared, causing objects to fall towards the center of the Earth.

Question 7

What is the acceleration rate of free falling objects?

Question 8

Why do objects thrown upward eventually fall?

Question 9

What defines an object in uniform motion?

chapter

4

Uniformly Accelerated Motion Analysis

Concepts covered:Uniformly Accelerated Motion, Acceleration, Scenarios, Analysis, Examples

Exploring scenarios to identify uniformly accelerated motion, distinguishing between examples like a bike at rest, a fruit falling, a boy holding a book, rocks falling, and a truck with constant acceleration.

Question 10

What defines uniformly accelerated motion?

Question 11

Do rocks falling from a cliff show UAM?

Question 12

Is a fruit falling from a tree UAM?

chapter

5

Projectile Motion: Understanding Horizontal and Vertical Components

Concepts covered:Projectile Motion, Horizontal Component, Vertical Component, Acceleration Due to Gravity, Trajectory Patterns

Exploration of projectile motion involving a man diving and a sepak takraw player, highlighting the distinct components of horizontal and vertical motion, acceleration due to gravity, and trajectory patterns like parabolas.

Question 13

Why is horizontal acceleration zero in projectile motion?

Question 14

What defines an object as a projectile?

Question 15

What does negative acceleration indicate in projectile motion?

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