Class 9 Physics Test Test Time Explore various categories of non-fiction books. Motion Understand concepts like distance, displacement, speed, velocity, acceleration, and equations of motion with graphical analysis. Force and Laws of Motion Learn about balanced and unbalanced forces, Newton’s laws of motion, inertia, and the concept of momentum and its conservation. Gravitation Explore the universal law of gravitation, free fall, thrust, pressure, buoyancy, Archimedes’ principle, and relative density. Work and Energy Study the concepts of work, power, energy, kinetic and potential energy, and the law of conservation of energy with applications. Sound Learn about the production, propagation, characteristics of sound waves, speed, frequency, pitch, reflection, and its applications.