Velocity and Acceleration Average speed Speed is a

Velocity and Acceleration

Average speed Speed is a scalar variable Unit = length over time (m/s)

Instantaneous velocity ØSpeed and direction of object at a particular instant in time ØVelocity is a vector variable

Average velocity vavg = ∆ d = displacement t time interval

Average velocity Another formula for average velocity Unit = length over time (m/s)

acceleration • Definition - Rate at which velocity changes • Acceleration is a vector

acceleration aavg = ∆v/t ∆v: change in velocity ∆t: change in time (time interval) ∆v = vf – vi

SCALAR VECTOR (Magnitude) (Magnitude & direction) Distance Position Displacement Velocity Acceleration Speed

Speed and Velocity Video https: //www. youtube. com/watch? v=DRb 5 PSx. Jer. M https: //www. youtube. com/watch? v=-6 lrr 6 -ADY 0

Tumble Buggies Minilab Step 1: Get a buggy, whiteboard, meter stick, and marker. Write down buggy color and letter on your white board. Step 2: Using your phone as a timer and a meter stick to measure distance, collect 710 distance vs. time data points (i. e. distance travelled in 1 s, 2 s, 3 s, etc. ), create a data table, and graph distance vs. time by plotting the points on your white board. Step 3: Use the slope of your plotted line to determine the velocity of your buggy.

Tumble Buggies, cont. Step 4: Join another group that has a different color buggy. Scenario 1: Using the two graphs each group created, determine where and when the blue buggy will catch up to the red buggy if the red buggy starts 3 m ahead of the blue one. Test your prediction.

Tumble Buggies, cont. Scenario 2: Using your graphs, determine where and when the two buggies will collide if they start 5 m apart facing each other. Scenario 3: Compare graphs as a class and determine which two buggies are the fastest. Which are the slowest? Scenario 4: Class pick!