Physical Science Warm-Up

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Presentation transcript:

Physical Science Warm-Up When you think of acceleration, what comes to mind? TAKE YOUR BEST EDUCATED GUESS AT THE FOLLOWING: What is acceleration? What is velocity?

Acceleration

Change in Velocity The rate at which velocity (speed in a given direction) changes occur is called acceleration.

Change in velocity = final – starting velocity velocity Acceleration= final velocity- starting velocity time Acceleration= change in velocity

- A constant acceleration produces a straight line or linear slope (rise/run). - The slope of a non-linear velocity-time graph (rise/run) will predict an objects instantaneous acceleration. a = v/t

Free fall The constant acceleration of an object moving only under the force of gravity is "g". The acceleration caused by gravity is 9.8 m/s2 If there was no air, all objects would fall at the same speed Doesn’t depend on mass

Galileo Acceleration= change in velocity time t = 0 t = 1 second t = 2 seconds t = 3 seconds

Falling Air resistance will increase as it falls faster An upward force on the object Eventually gravity will balance with air resistance Reaches terminal velocity - highest speed reached by a falling object.

Next Step Complete all worksheets from previous class (extra on bench if you happened to misplace yours) Complete acceleration and velocity worksheet Lab NEXT TIME I SEE YOU