Physics O level Turning Effect of Forces

Sec 4

Course Intro

  • Discover the fascinating world of The Turning effects of forces.
  • Unleash the power of moments and their influence on objects in motion.
  • Explore real-life examples that demonstrate the principles of force dynamics.
  • Aligned to Singapore Olevel MOE Syllabus

Course Description

  • This course will cover the fundamental concepts of mechanics, specifically focusing on the study of forces and their effects on objects.
  • The course will begin by introducing the concept of a moment of force and how it is used to calculate the rotational equilibrium of an object.
  • Students will learn about the principle of moments, which states that the sum of the clockwise moments about a point is equal to the sum of the counterclockwise moments about that point.
  • Additionally, the course will cover the concept of the center of gravity and how it relates to the stability of an object.

Who is this Course for?

  • This course is designed for students at the Sec 4 / O Level who want to enhance their understanding of the turning effect of forces in Physics.
  • It is suitable for students sec 3/ sec 4 / sec 5 who are keen to explore the principles of force dynamics and apply them to real-world situations.

What you will Learn?

  • The concept of moments and how they relate to the turning effect of forces.
  • How to apply moments to solve problems and analyze various situations involving forces.
  • The principle of moments for bodies in equilibrium and its significance in ensuring balance.
  • The concept of the center of gravity and its impact on stability and calculations.
  • The conditions required for equilibrium and how they contribute to the stability of objects.

Key Takeaways

  • Gain a comprehensive understanding of the turning effect of forces and its applications.
  • Develop problem-solving skills by applying the principles of moments in various scenarios.
  • Enhance your knowledge of equilibrium conditions and their relation to stability.
  • Grasp the concept of the center of gravity and its implications in force dynamics.
  • Acquire practical insights into real-life examples that demonstrate the turning effect of forces.

Why Learn from doerdo Tuition Course?

  • Experienced Teachers: Our expert ex-MOE teachers provide top-notch guidance and support.

    Real-time Performance Tracking: Parents can monitor students’ progress through detailed insights.

    After-Class Support: Students receive help and clarification from teachers beyond class hours.

    Al-Based Assessments: Benefit from Al-generated tests and homework for personalized learning.

    Engaging Content: Interactive learning resources make studying science enjoyable and effective.

Course Curriculum

Moment of a force The concept of moment is introduced, which is the turning effect of a force. Everyday examples, such as opening a door, illustrate this.
Application of moments Students learn to apply the relationship between moment of a force, force, and perpendicular distance from the pivot in various situations.
Principle of moments The principle of moments for a body in equilibrium is explained, emphasizing the balance between clockwise and counterclockwise moments.
Application of principles Students are encouraged to apply the principle of moments to solve problems and analyze new situations, involving balanced or unbalanced forces.
Centre of gravity Understanding that the weight of a body can be treated as acting at its center of gravity, simplifying calculations and stability analysis.
Equilibrium conditions Exploring the conditions required for equilibrium, where the sum of forces and moments acting on an object is zero, ensuring stability.

Course Type


Class Type

Small Group

Group Size



1.5 hrs

Num of Sessions




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Young Wai Keong Vincent

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Mary Lin An Chin

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Suriawati Binte Sulaimi

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Tan Qianru

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Yee Hong Ng

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