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Published byDortha Molly Wells
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Acceleration & Speed How fast does it go?
Definition of Motion Event that involves a change in the position or location of something.
Speed Comparison of time and distance –Distance traveled per unit time
Average Speed Speed over a period of time
Speed Instantaneous Speed Speed at any instant
Speed Constant Speed Speed that does not change –Instantaneous speed that does not change
Velocity Speed AND direction
Acceleration A change in velocity –Speeding up Positive acceleration –Slowing down Negative acceleration Deceleration –Changing direction
Calculating Speed Given Distance & Time Divide Distance by Time Distance ÷ Time = Speed Speed = Distance ÷ Time D ST Speed = Distance Time
Let’s Practice Solve for Speed A runner completes a 400m race in 43.9s. What was his speed? Speed = Distance Time Speed = 400m 43.9s Speed =9.1m/s 2
Let’s Practice Solve for Speed A runner runs a 100m race in 10s. What is his speed? Speed = Distance Time Speed = 100m 10s Speed = 10m/s 2
Calculating Distance Given Speed & Time Multiply Speed and Time Distance = Speed X Time Speed X Time = Distance D ST Distance =Speed Time
Calculating Time Given Distance and Speed Divide Distance by Time Distance ÷ Speed = Time Time = Distance ÷ Speed D ST Time = Distance Speed
Calculating Acceleration Acceleration Equation Acceleration = (final speed (in m/s) – initial speed (in m/s)) Time (in seconds) A= (s f -s i ) t
Motion and Force A. Motion 1. Motion is a change in position
Objectives: 1.Be able to distinguish between distance and displacement 2.Explain the difference between speed and velocity 3.Be able to interpret motion.
Table of Contents 2 Chapter 2 Motion.
Motion Physics 8 th Grade Science. Frame of Reference An object is in motion when its distance from another object is changing. Whether an object is moving.
Distance Time Graphs Time is always plotted on x axis
Motion 4.1 Speed and Velocity.
2-1 Describing Motion What factors are important when describing motion? Time Distance.
Acceleration. The concepts of this lesson will allow you to: Explain the terms that are associated with motion and acceleration. Analyze acceleration.
Motion, Speed & Acceleration Review
Describe Speed A way to describe motion –Average speed - Rate of motion calculated by dividing the distance traveled by the amount of time it takes to.
Acceleration is a change in velocity by Changing speed: ▪ Starting ▪ Stopping ▪ Speeding up ▪ Slowing down Or changing direction.
Motion SWBAT define speed and acceleration; relate acceleration to change in speed; calculate distance, speed, and acceleration.
Shrinking Moon Explanation on next slide. Velocity Is a description of an object’s speed and direction. formula is the same as for speed Velocity=
Displacement Speed and Velocity Acceleration Equations of Kinematics with Constant A Freely Falling Bodies Graphical Analysis of Velocity and Acceleration.
Speed and Velocity What is speed, velocity and acceleration?
Acceleration is the rate that velocity changes over time. An object is accelerating if ◦ Its speed changes ◦ Its direction changes ◦ Both its speed.
Acceleration Definition 2 ways to do it Positive acceleration Negative acceleration (deceleration) A change in velocity Change speed and/or Change direction.
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