Ankit Shrivastava on Instagram: "important questions and topics related to work, power, and energy for Class 9th: *Key Concepts:* - *Work*: Product of force and displacement in the direction of force. Its SI unit is Joule (J). - *Energy*: Ability of a body to do work. Its SI unit is also Joule (J). - *Power*: Rate of doing work or transferring energy. Its SI unit is Watt (W). *Important Questions:* - What is the work done when a force of 1 N displaces an object by 1 m in its direction? (Answer: