Login Get started

Class 9 Physics - Chapter 3 / Laws Of Motions ചലനനിയമങ്ങൾ - Part 1 | Xylem Class 9

Xylem class 9・63 minutes read

The importance of understanding physics concepts like force direction and resultant force is highlighted through practical examples and equations involving multiple forces. Balancing forces leads to no movement, while unbalanced forces cause objects to move in the direction of the greater force applied.

Insights

Understanding the direction of forces is crucial in determining the resultant force, with the equation f = f1 + f2 being key in solving problems with multiple forces.
Balanced forces result in a zero resultant force, indicating no movement, while unbalanced forces cause motion, highlighting the importance of grasping physics equations and concepts for practical applications.

Get key ideas from YouTube videos. It’s free

Recent questions

What is the importance of understanding force direction?
Understanding the direction of force is crucial in determining the resultant force.
How are practical examples used to explain motion in physics?
Practical examples like pushing a car and rowing a canoe are used to explain motion.
What is the equation to find the resultant force?
The equation to find the resultant force is F = F1 + F2, where multiple forces act on an object.
How is the concept of balanced forces explained?
If the resultant force is zero, the object is balanced and does not move.
Why is it important to respect school teachers?
The importance of respecting school teachers and the efforts they put into teaching is highlighted.

Related videos

Summary

00:00

Physics students face exams, discuss Laws of Motion.

Onam celebration has concluded, and schools have reopened after four days.
A message is shared, emphasizing the importance of listening and sharing.
Physics concepts are discussed, with a focus on understanding and attending classes.
Physics students faced two exams in one day, with varying levels of difficulty.
An upcoming live class on the Xylem app for Ninja Batch is announced.
The chapter being studied is "Laws of Motion," with a detailed examination of concepts.
The importance of understanding force direction and vector quantities is highlighted.
Practical examples like pushing a car and rowing a canoe are used to explain motion.
The chapter includes questions related to cricket, javelin throw, and force application.
The text book contains questions about motion and force, encouraging clear understanding and application.

14:25

"Cricket ball, force, and motion explained"

Cricket ball is used in school arts festivals and sports, including football, cricket, baseball, and shuttle teams.
Children playing cricket learn about vector and scalar quantities.
Motion is correctly described as reducing force.
Hand movement in cricket is explained as a way to reduce injury.
Catching a cricket ball involves moving the hand back to reduce injury.
Tug-of-war is discussed, with the winning team being the one exerting more force.
The force applied by both teams in tug-of-war is not equal.
The team applying more force is considered stronger.
Understanding the direction of force is crucial in determining the resultant force.
The equation to find the resultant force is F = F1 + F2, where multiple forces act on an object.

29:58

Calculating Resultant Force with Multiple Forces

The equation to find the resultant force is f = f1 + f2.
The resultant force is the total force when multiple forces act on an object simultaneously.
The effective force is the sum of forces acting on an object.
The resultant force equation is f = f1 + f2, where f1 and f2 can be positive or negative.
Understanding the direction of forces is crucial in determining the resultant force.
Balancing forces results in a zero resultant force, indicating no movement.
The resultant force is calculated by adding or subtracting the forces acting in different directions.
The direction of the resultant force is determined by the balance of forces in opposite directions.
The equation f = f1 + f2 helps in solving problems involving multiple forces.
Paying attention to the signs of forces (positive or negative) is essential in calculating the resultant force accurately.

46:36

"Confidence, Forces, Equilibrium: Keys to Success"

The importance of confidence in achieving success is emphasized throughout the text.
A practical example involving a child exerting 150 newtons of force is used to explain the concept of resultant force.
The text includes a question about finding the resultant force when two forces are applied in opposite directions.
Instructions are given to determine the direction in which an object will move based on the forces applied.
The concept of balanced forces is explained using numerical examples involving different force values.
The text mentions a table in a textbook related to forces and provides practical examples to understand the concept.
Details about an upcoming live class on an app called Xylem are shared, including a 20% discount offer.
The importance of respecting school teachers and the efforts they put into teaching is highlighted.
The text encourages participation in school events like sports and arts festivals for a holistic learning experience.
The concept of equilibrium and balanced forces is reiterated, emphasizing the importance of understanding physics equations.

01:01:39

Understanding Balanced and Unbalanced Forces in Motion

If the resultant force is zero, the object is balanced and does not move.
Balancing involves understanding the numbers and forces acting on each side.
Plus indicates rightward force, while negative implies leftward force.
Swaroopa Sunil De emphasizes the importance of remembering these concepts.
In textbooks, tables and questions help reinforce understanding.
Movement occurs when the resultant force is non-zero, while balance means no motion.
Unbalanced forces cause movement, while balanced forces maintain stillness.

Try it yourself — It’s free.