Speed, Velocity, and Acceleration

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Presentation transcript:

Speed, Velocity, and Acceleration Clarifying Misconceptions

Objectives Differentiate between speed, velocity, and acceleration Calculate speed, distance or time, using the speed equation

Speed Speed is a measurement that describes the distance a moving object travels per unit of time Speed is the rate at which an object moves To calculate speed you need a distance and a unit of time

Instantaneous speed and average speed Instantaneous speed is the speed an object is moving at a specific instant of time Average speed is the overall rate at which an object moves

Velocity Velocity describes an objects speed and the direction of its motion Velocity is speed in a given direction and includes “a straight line”

Graphing motion You can use a line graph that plots distance vs. time to describe an object’s motion The slope of the line represents the objects speed

Who is Mr Slopeface? Remember slope is rise over run The steeper the slope the faster the movement A horizontal line means no change in distance - stopped

Acceleration Acceleration is the rate at which velocity changes Remember velocity is speed with direction You can have an increase, or decrease in speed, or even a simple change in direction Slowing down is a negative acceleration

What is m/s2 The object is already traveling at _m/s Acceleration is the change in speed, per unit of time… Meters per second per second