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UCF L2 Video Clip 1: Class discusses CQ 2-1
The instructor calls on students to explain their reasoning for two answers to CQ 2-1. The first student justifies C; the second student justifies A; and the third student justifies A. The next two students also justify A and the last student (Vanessa from Group 1) chooses A. Vanessa argues that if there were a box being pushed with two equal and opposite forces it would remain still (choice C) but because these are fans they inherently vibrate and so the cart will vibrate back and forth.
UCF L2 Video Clip 3: Class discusses CQ 2-2
The instructor asks for students to justify their answers to CQ 2-2. A student choosing B (she chose C last time) now argues that since there is a net force of zero the cart should maintain a constant speed.
UCF L2 Video Clip 4: Group 1 discusses CQ 2-3
Group 1 discusses CQ 2-3. Vanessa thinks the cart will initially speed up but Megan thinks it's the same situation as in the previous question and Mikayla agrees. Jessica mentions friction and concludes that if we ignore friction then the situation is the same; but with friction it would slow down. [Vanessa seems confused but Jessica clarifies it for her.] They choose A.
UCF L2 Video Clip 7: Class discusses SQ #3
The instructor asks some students to share their answer to SQ #3. The first student refers to the experience of having to constantly press on the accelerator pedal of your car to keep the car going at the same speed. The second student refers to Isaac Newton (first law) and says students tend to forget about friction.
UCF L2 Video Clip 1: Class discusses CQ 2-1