Explore fundamental concepts of work, energy, and power in this comprehensive Grade 9 physics unit. Delve into topics such as work against gravity and friction, gravitational potential energy, elastic potential energy, and energy in oscillating systems. Gain a solid understanding of various energy resources and their applications. Reinforce your learning through review questions designed to test your comprehension of key concepts. This educational content, tailored for Ethiopian Grade 9 students, provides a thorough foundation in essential physics principles over the course of 2 hours and 30 minutes.