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

UCF L4 Video Clip 2: Group 2 discusses question about forces on the colliding carts

UCF L4 Video Clip 3: Class discusses question about force diagrams

UCF L4 Video Clip 4: Group 1 discusses CQ 4-2

UCF L4 Video Clip 5: Class discusses SQ #1

UCF L4 Video Clip 6: Group 2 discusses SQ #3 (CQ 4-5)