UPEF L4 Video Clip 1: Group 1 discusses CQ 4-1

UPEF L4 Video Clip 1: Group 1 discusses CQ 4-1

Group 1 discusses CQ 4-1. Ryan drops a pencil several times and argues why it cannot be A or B or C. He suggests the answer is D.

UPEF L4 Video Clip 2: Group 5 discusses CQ 4-1

UPEF L4 Video Clip 2: Group 5 discusses CQ 4-1

Group 5 discusses choices for CQ 4-1. Emily initially suggests choice B but Renee challenges that because she doesn't think the object stops speeding up. Then they consider both C and D and finally agree on D. [Shortly thereafter they watch the movie of the falling basketball and that confirms choice D.]

UPEF L4 Video Clip 3: Group 5 discusses CQ 4-3

UPEF L4 Video Clip 3: Group 5 discusses CQ 4-3

Group 5 discusses CQ 4-3. Emily says it's not magnetic. Sarah refers to a circular ride at an amusement park that sucks you in to support choice C—that the rotation of the earth causes gravity.

UPEF L4 Video Clip 4: Group 5 discusses why magnetism cannot cause gravity

UPEF L4 Video Clip 4: Group 5 discusses why magnetism cannot cause gravity

After answering questions at top of p. 33 Renee argues why magnetism cannot cause gravity. [This reinforces the group's belief that the rotation of the earth causes gravity. However, after watching the movie of the object hanging on a rotating platform, they realize it cannot be the rotation of the earth.]

UPEF L4 Video Clip 5: Group 5 discussion about energy diagrams in general

UPEF L4 Video Clip 5: Group 5 discussion about energy diagrams in general

After Group 5 responds to CQ 4-4 they discuss how the energy diagrams ('charts') have built upon each other and that one can use the same approach for all of them; you just need to know the different kinds of energy.