Power and Efficiency

In previous lesson, we have discussed energy, including the kinetic energy, the potential energy, the principle of conservation of energy and the work energy model. In this lesson, we are going to discuss power, equation of power, efficiency and equation of efficiency. In SPM, there are 3 points that you need to know about power: … Read more

Energy

In previous lesson, we have discussed work. In this lesson, we are going to continue with energy. First of all, we will discuss the definition of energy. After that we will discuss 2 types of energy: the kinetic energy and potential energy. There are 2 types of potential energy: gravitational potential energy and elastic potential … Read more

Work

Work, Energy and Power is the last section of second chapter of SPM form 4 physics. In this section, we are going to discuss work, including what is meant by work done and the unit of work done. We will also discuss the equation of work done, when the direction of force is NOT the … Read more

Force as a Vector

Force as a vector is the last part in this course. In SPM, under force as a vector, we need to learn addition of vectors, resolution of vectors, inclined plane and equilibrium of forces. In this lesson, we will focus on addition of forces, where we will discuss how to use the triangle law and … Read more

The Force of Gravity

In gravity, we will discuss the gravitational field, free falling, lift and pulley. Under gravitational field, we will discuss what is gravitational field, gravitational field strength, gravitational acceleration and weight are. In free falling, we will discuss dropping object from a high place and launching object upward. We will also discuss the graphs of motion … Read more

Impulse and Impulsive Force

In previous lesson, we have discussed Newton’s second law of motion. When a net force is applied on an object, the acceleration of the object is directly proportional to the net force and inversely proportional to the mass of the object. From Newton’s second law, we deduced the equation F=ma. We have also discussed friction, … Read more

Effects of Force and Newton’s Second Law

“Effects of force” is one of the most important sub-topics in Force and Motion. Under effects of force, there are 4 main subtopics: Newton’s second law, Newton’s third law, impulse and safety features of vehicles. In this lesson, we will only discuss Newton’s 1st and 2nd law. We will discuss “impulse” and “safety features of … Read more

Understanding Momentum

In previous lesson, we have discussed inertia, including what is inertia, Newton’s first law of motion, situation involving inertia, mass and inertia and reducing negative effects of inertia. In this lesson, we will discuss momentum, including the principle of conservation of momentum and its applications. Under principle of conservation of momentum, we will discuss how … Read more

Understanding Inertia

Introduction Force is a subtitle in Force and Motion, the second chapter in SPM form 4 physics. In force, we have 5 main subtopics: inertia, momentum, effects of force, gravity and force as a vector. In inertia, we will discuss Newton’s First Law, situation involving inertia, mass and inertia and reducing negative effects of inertia. … Read more

Velocity-Time Graph

In previous lesson, we have learned how to analyse a displacement-time graph and finding velocity from a displacement-time graph, where the velocity is equal to the gradient of the graph. In this lesson, we are going to proceed to velocity-time graph, where we will learn how to analyse a velocity-time graph, how to solve the … Read more