Conservation of Angular Momentum (1/2)
This topic works just like conservation of regular momentum, but looks very different. I have a question about conservation of regular momentum on the left side. The right side refers to me spinning in a deskchair holding barbells. Instead of mass increasing like it does in the question on the right, rotational inertia increases because I push the barbells out, making them farther from the axis of rotation. Thus no collision is necessary to change an objects mass. That said, momentum is conserved in both situations. The result is that I go faster with barbells tucked in, and slower with them out, something that figure skaters, gymnasts, and divers take advantage of to vary their spin speeds.
Figure Skater using Conservation of Angular momentum to land a triple axel
www.youtube.com/watch?v=XzFGzsn6Skg
Divers using Conservation of momentum to land a dive
www.youtube.com/watch?v=d_BXFPeebJ8
A forte turn in ballet
www.youtube.com/watch?v=gVVLLAwxWxM
Conservation of Angular Momentum (1/2)
This topic works just like conservation of regular momentum, but looks very different. I have a question about conservation of regular momentum on the left side. The right side refers to me spinning in a deskchair holding barbells. Instead of mass increasing like it does in the question on the right, rotational inertia increases because I push the barbells out, making them farther from the axis of rotation. Thus no collision is necessary to change an objects mass. That said, momentum is conserved in both situations. The result is that I go faster with barbells tucked in, and slower with them out, something that figure skaters, gymnasts, and divers take advantage of to vary their spin speeds.
Figure Skater using Conservation of Angular momentum to land a triple axel
www.youtube.com/watch?v=XzFGzsn6Skg
Divers using Conservation of momentum to land a dive
www.youtube.com/watch?v=d_BXFPeebJ8
A forte turn in ballet
www.youtube.com/watch?v=gVVLLAwxWxM