YOUNG TECHNOLOGIST @SCHOOL

SHM general equation: Displacement; x ( t ) = A sin(ω t  ± φ) Tips: Differentiate  x ( t ) you will get the velocity equation of the particle v ( t ) Differentiate v ( t ) you will get the acceleration equation of the particle  a ( t ) Revision Chapter 7 👉 Question 2 and Question 3

Chapter 5: Rotational Motion   Tips: By using kinematics general equation, change all variables into rotational variable symbol - you will gain 1 mark for using the correct variable symbol in rotational motion equation. Rotational motion variable: θ (angular displacement) , ω (angular speed),  α (angular acceleration) Revision Chapter 5👉 Question 1 to Question 4 Chapter 6: Work, Energy, Power General formula: W = Fs cos θ Tips: Always consider the angle between Force and displacement!!! Revision Chapter 6👉 Question 1 to Question 4

  Step-by-Step to solve dynamics problem: 1. Identify the Newton's Law 2. Draw the FBD 3. Derive the Newton's law equation (REFER TO YOUR FBD!) Notes & Tips Q1. What is it mean by TOTAL FORCE? A1. ALL FORCEs acted on the body are the total force. Q2. What kind of force to be considered as total force? A2. Weight (W), frictional force (f), Tension (T), Normal force (R), etc. Note that all physical quantities mentioned here have the same SI unit which is Newton (N). Q3. How to determine the direction of the force? (positive or negative) A3. - For N. 1st Law = all forces directed to the right & in upward motion are positive, all forces to the left & in downward motion are negative. - For N. 2nd Law = all forces acting at the same direction to acceleration (a) are considered as positive force. Example: the object is moving to the left with acceleration, a. Hence, all forces directed to the left are considered to be positive! Revision Chapter 4☝ Question 1 and Question 2...