PPT-Distance and Displacement

Chapter 111 Frame of Reference Everyone wants to go fast Whether it is a gangster on a bike or an antelope running away from a cheetah To describe either of these motions correctly we need to have a frame of reference . Scalar quantities . have only a magnitude (amount).. Vector quantities . have a magnitude . and. a direction. . We represent them as . arrows. .. Distance. (d): . the . separation between . two . points. . In maths, words can be very important and sometimes have a more specific meaning than we first think.. For example, if we talk about ‘doing a sum’, many people think this means the same as a ‘doing a calculation’, but ‘sum’ means ‘addition’, so 7-3=4 is not strictly a ‘sum’ at all.. “Jeff”, “Mr Jeff”, “Mr C”, “Ciaccio” (See-ah-co) are all fine. Summer Physics Bootcamp. Contact Information. www.MSEAcademics.com. . Cell:770-401-6731. Jeffcia@MSEAcademics.com. . Warm up. Describing the Motion of Objects. Distance (. d. ): . The total length of the path travelled by an object. Measured in meters (m). Describing the Motion of Objects. Direction: . The line an object moves along from a particular point. M. echanics. - the study of the motion of objects. we focus on the language, principles, and laws that describe and explain the motion of objects. Kinematics. is the science of describing the motion of objects using words, diagrams, numbers, graphs, and equations. . Scalar quantities . have only a magnitude (amount).. Vector quantities . have a magnitude . and. a direction. . We represent them as . arrows. .. Distance. (d): the separation between . two points. . Today’s Learning Objectives. Know the terms in this chapter.. Why is a reference point needed to describe motion?. What is the difference between distance and displacement?. How do you add vectors?. Vector Quantity. Fully described by both magnitude (number plus units) AND direction. Represented by arrows. -displacement. -velocity. -acceleration. -force. Scalar Quantity. Fully described by magnitude alone. Name: . Hour: . Determine displacement based on distance measurements.. Calculate speed and velocity based on position and elapsed time.. Create and interpret distance-time graphs.. Calculate acceleration based on speed and elapsed time.. To describe motion, you must state the direction the object is moving as well as how fast the object is moving. You must also tell its location at a certain time.. What is needed to describe motion completely?. Essential Question: How do you calculate the displacement and velocity of an object?. What is mechanics?. The branch of physics concerned with motion and forces.. The subset of mechanics that describes motion without regard to its causes is called kinematics.. Distance vs Displacement. Distance – the total amount traveled.. Displacement – the total amount displaced from the starting point.. Solving Problems. Organize the Information. Sketch the scene. Verify Units. Lesson 11 . February 2. nd. , 2011. If a student said that they had to walk 800m to get to school today, you would only know the distance they travelled and the destination. You would not know their starting point or the directions they took to get here. Distance and Displacement. Learning Objectives. I can describe the difference between scalar and vector quantities.. I can determine displacement and distance using a scale diagram or calculation.. I can calculate the displacement of an object with two vector quantities in one direction or at right angles..