Acceleration First…let’s review….

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Presentation transcript:

Acceleration First…let’s review…

Speed is the rate at which an object changes position… SLOW SPEED (10 m/s) FAST SPEED (20 m/s)

Which equation do we use??? t=d/s s=d/t d=s⋅t

The trick of the triangle… d s t

The trick of the triangle… Cover up the variable you are solving for… d s t d = s⋅t

The trick of the triangle… d s t s =

The trick of the triangle… d s t t =

Now try this…

Velocity is speed and direction… SMALL VELOCITY (10 m/s to the right) LARGE VELOCITY (20 m/s to the right)

Why does direction matter? Let’s go to the beach! 20 m/s East 20 m/s West Who will reach the beach first? Pictures from clipartof.com

How do we change velocity? 1) Speed up 2) Slow down 3) Change directions

Your turn….

Forces A force is a… …or a…

Forces Balanced forces Unbalanced forces No change in motion Constant speed in a straight line Unbalanced forces Change in motion Speed up, slow down, or change directions

Your turn…

Changing velocity is called ACCELERATION (a) Speeding up, slowing down, or changing directions…

Answer these questions…

Examples of things accelerating… http://www.freeclipartnow.com, http://upload.wikimedia.org, www.clipartguide.com, www.webweaver.nu icons.mysitemyway.com, cdn1.sbnation.com, laundelles.files.wordpress.com