PPT-Velocity/Acceleration Vector vs. Scalar Quantities

A vector quantity is a quantity that has both magnitude and direction Velocity acceleration and force are examples of vector quantities A scalar quantity is a quantity that has magnitude but no direction Time mass volume and speed are examples of scalar quantities. Physical quantities. Any quantity that can be quantified by measurement is a physical quantity . Most of the quantities we deal with as scientists are physical quantities and they will be the ones we will discuss throughout this topic of motion.. Kinematics. is the branch of physics that describes the motion of points, bodies (objects) and systems of bodies (groups of objects) without consideration of the causes of motion.. Kinematics. One-dimensional kinematics involves movement along one axis.. :. Students will be able to:. Describe the motion of a particle traveling along a curved path.. Relate kinematic quantities in terms of the rectangular components of the vectors.. In-Class Activities. What are the different types of motion?. Simple harmonic motion.  a type of . periodic motion.  where the restoring force is directly proportional to the displacement. .. Examples:. Uniform circular . GENERAL & RECTANGULAR COMPONENTS. Today’s Objectives. :. Students will be able to:. Describe the motion of a particle traveling along a curved path.. Relate kinematic quantities in terms of the rectangular components of the vectors.. Task 1 . Get into pairs having one person facing the board (Person A) whilst the other faces away (Person B). . Person A will be shown a distance-time graph, they must explain the journey that it shows to Person B. . 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. Bell Ringer 11-7-13. Compare and Contrast Speed, Velocity and Acceleration. is the speed of an object in a particular direction. MYP Unit Question: What Moves YOU!!. Area of Interaction: Human Ingenuity. Displacement: . Is the distance from where you start to where you finish. . Δ. d=. d. f. -d. i. Velocity:. How fast and in what direction (vector quantity). V = ∆d/t. Speed: . How fast (scalar quantity). Velocity and acceleration Measuring an objects motion speed Speed is calculated by dividing distance by time S = d/t 5.0 km/h 2.5 m/s 45 mph velocity Velocity is the same as speed, but you tell the direction of motion in the answer. Acceleration is a change in velocity. Speed or direction. Centripetal Acceleration. Acceleration can mean a change in direction, not just speed. Centripetal acceleration. Acceleration that occurs in a circular motion. Acceleration is a measure of . the change in velocity per unit of time. When the velocity of an object is changing, it is . accelerating. Negative acceleration: . slowing down. Positive acceleration: . Motion in Two Dimensions. Using + or – signs is not always sufficient to fully describe motion in more than one dimension. Vectors can be used to more fully describe motion. Still interested in displacement, velocity, and acceleration. Defination. In non-uniform motion,the velocity of a body changes with time . For example, when a train leaves or approaches the platform its velocity changes with time. The change in velocity of an object with time is given by a physical quantity known as acceleration. .