In class I introduced Vavg = ∆d / ∆t
Students measured the average speed of a cart traveling at a constant velovity as well as a ball rolling down an incline.
Example data: The cart traveled 150 cm in a time of 12.5s
Example calculation: Vavg = ∆d / ∆t
Vavg = 150cm/12.5s
Vavg = 12 cm/s
Students were also asked to describe an important difference in how the two objects moved. The observation that I was hoping students would make is that the cart moved at a constat speed while the ball accleerated down the incline.
Homework: Chapter 2 - Read section 2.1-2.3
Problems 1,2,3,4,7,9a on page 39
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