PPT-4.3 Velocity Speed is a description of how fast an object moves; velocity is how fast

In physics velocity is speed in a given direction When we say a car travels at 60 kmh we are specifying its speed When we say a car moves at 60 kmh to the north we are specifying its velocity. Section 3.4a. The difference quotient:. When we let . h. approach 0, we saw the rate at which a function. w. as changing at a particular point . x. …. Definition: Instantaneous Rate of Change. The . Motion along a straight line. Position and displacement. Velocity and speed. Acceleration . as derivative of velocity with respect to . time. Interpret . the sign of velocity and acceleration . Welcome to Physics 1135!. Motion is relative. An object’s motion is always described in reference to another object. Relative Motion. When an object is said to be traveling at 60 km/. h (or at any speed), . it is implied that it is moving at 60 km/h relative to the Earth.. © 2015 Pearson Education, Inc.. Velocity and Speed. Speed measures only how fast an object moves, but velocity tells us both an object’s speed . and its direction. .. The . velocity defined by Equation 1.2 is called the . Describe the speedometer on a car that is entering a highway, drives for 25 miles and then exits the highway.. Consider the two situations below. When a shuttle bus approaches a stop, the driver begins to apply the brakes to slow down 5.0 s before actually reaching the stop. The speed changes from 9.0 m/s to 0 m/s over time.. How are instantaneous speed and average speed different?. . Speed. Average speed is computed for the entire duration of a . trip (includes starts and stops so it slows your rate down), . and instantaneous speed is measured at a particular . Know . The definition of scalar and vector quantities. Understand. Concept of distance, displacement, speed and velocity. Be able to . Determine distance and displacement in a given situation with units. 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). 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). 9/18/18. What Is Motion?. Motion is when an object changes place or position. . To properly describe motion, you need to use the following:. Start and end position?. Movement relative to what?. How far did it go?. Velocity is a vector, speed a scalar. Average speed – total distance divided by time. Average velocity – total displacement divided by time. Speed and velocity may or may not have the same magnitude. Definitions . Speed. : speed of an object is define as the distance traveled by it per unit time .I.e. speed of an object tells us how fast an object moves. Expression for speed : let distance traveled by an object be S in time t .then. Significant Figures, Measurements, Errors. Vectors, Relative Motion. Studying Tips. Equilibrium and Non-equilibrium Problems. Circular Motion, Centripetal Force. 1. PHY131. 1. st. half. Exam. Jam. Jason Harlow. 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. .