Building Science Champions

 For the picture below write a paragraph on what motion occurred to get to this exact moment of the baseball game.  Words to use in your paragraph: ◦ Motion ◦ Speed ◦ Acceleration ◦ Velocity ◦ Force ◦ Safe or out

 Describe what happens to the motion of an object as it accelerates  Calculate the acceleration of an object and graph changing speed and distance of an accelerating object

 Acceleration  Linear  Nonlinear

 Acceleration - is the rate at which velocity changes  Velocity – is speed and direction  Acceleration therefore encompasses an increase or decrease in speed or change in direction

 Increase in speed is referred to as acceleration or positive acceleration – a runner starting a race would be positive acceleration  Decrease in speed is referred to as negative acceleration – a car slowing down would be negative acceleration  A change in direction – a car changing lanes would be a change in direction therefore a change in acceleration

 To calculate acceleration you must know the velocity during different periods of time  Acceleration = final velocity – initial velocity divided by time  Formula to calculate acceleration:  SEE ELMO

 Graphs are used to analyze the motion of an object  A straight line reflects constant acceleration  A curved line reflects a change in acceleration  A straight line shows a linear relationship – as each unit of time increase the distance increases by the same amount in each unit of time  A curved line is nonlinear – as each init of time increase the distance does not increase by the same amount in each unit of time

 Acceleration is a change in velocity  Three types of acceleration – increase in speed, decrease in speed, or change in direction  Acceleration is easily shown on a graph

 Anderson, M. et all (2012) Physical Science. McGraw-Hill: Columbus  Frank, D.V et al (2001). Physical Science. Prentice Hall: New Jersey