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Integrated Science: Grade 10 Activity: Newton’s First Law Newton’s First Law of Motion AIMS: Accurately describe and interpret situations involving Newton’s first law of motion. Understand the concept of inertia (mass) Draw free body diagrams for balanced and unbalanced forces Understand the concepts of and differences between mass and weight INSTRUCTIONS: Answer the following questions and take good notes when necessary. This assignment will work well as a study guide if done neatly and properly. The solutions to this assignment will be posted on Moodle later – be sure to check your answers to the solutions. Open http://www.physicsclassroom.com/Class/newtlaws/ Read Lesson 2a: Meaning of Force Answer the following questions: a. Define force, identify whether it is a vector or scalar quantity and state the standard SI unit used for force. b. What is a “normal” force? c. Forces and other vectors are represented by arrows. Complete the following sentence: The length of the arrow represents the of the arrow shows the direction the of the force and the direction is acting. d. Distinguish balanced and unbalanced forces Read Lesson 1a: Newton’s First Law Answer the following questions: a. State Newton’s first law – the law of inertia. b. Complete the following sentence: When forces are balanced the object has there are no changes in motion when forces are balanced. acceleration. Hence, Integrated Science: Grade 10 Activity: Newton’s First Law View the two Animations. c. Use Newton’s first law to explain why the person and the ladder keep moving after the vehicles come to an abrupt halt. Read Lesson 1b: Mass and Inertia Answer the following questions: a. State the meaning of inertia. b. Using the following diagrams write a detailed account of how Galileo came up with the concept of inertia. c. What did Newton derive from Galileo’s concept of inertia? d. Identify the unbalanced force that stops objects continuing with constant speed in a constant direction forever and ever. e. How are mass and inertia related? Integrated Science: Grade 10 Activity: Newton’s First Law Answer the following additional questions. Integrated Science: Grade 10 Activity: Newton’s First Law Read Lesson 1c: State of Motion Answer the following questions: a. What do we mean by state of motion? Provide two examples: one at rest and one for constant motion. Read Lesson 1d: Balanced and Unbalanced Forces Answer the following questions. Integrated Science: Grade 10 Activity: Newton’s First Law