1. Appreciating machines [Lesson No. 25]

2. This is NOT a simple machine, though. However, concepts from the last two chapters are incorporated in its construction. STABILITY PRINCIPLE OF LEVER

3. STABILITY “The CG of the equipment has to be directly above its base area.”

4. This is NOT a simple machine, though. However, concepts from the last two chapters are incorporated in its construction. PRINCIPLE OF LEVER “The moment of load is equal to the moment of effort if an object is in equilibrium [balanced].”

5. AT HOME IN THE OFFICE IN SCHOOL HERE AT THE PHYSICS LAB Did you bring a LEVER today? Triple-beam balance Platform balance

6. … have been helping MAN do his work EASIER. TREBUCHET CATAPULT

7. “Kids, we are going to WAR, today!”

8. “How can catapults throw heavy objects to different target locations!” MARSHMALLOW here RUBBER BAND FULCRUM

9. “How can catapults throw heavy objects to different target locations!” MARSHMALLOW here RUBBER BAND FULCRUM

10. “How can catapults throw heavy objects to different target locations!” MARSHMALLOW here RUBBER BAND FULCRUM

11. “How can catapults throw heavy objects to different target locations!” MARSHMALLOW here RUBBER BAND FULCRUM

12. “Now, let us PREPARE for WAR. Build your CATAPULTS [and answer the guide questions in the WORKSHEET provided.]” Time: 30 minutes

13. “It’s TIME to check your UNDERSTANDING.” Time: 5 minutes

14. URL: http://fairviewscience web.wordpress.com “Visit our BLOGSITE at anytime convenient between tonight and Sunday for the details about our REVISIONS and PRACTICE QUESTIONS about LEVER SYSTEMS.”