kinetic energy
Honda crf450.
skill memory
A long bike ride that is partially uphill be would be considered vigorous physical activity.
2007 CR250R and a 2010 CRF450R
It depends on the state and the type of bike.
I would say that depends heavily on the type of bike you are riding and the roof you intend to ride it on. If it were a unicycle on the roof of a football stadium, then yes. If it were a motorbike on the roof of a greenhouse, then I think not.
A bike-and-ride is the act of using a bicycle in conjunction with another type of transportation such as public transport, a system which ordinarily involves bicycle storage, and the ability to travel from stop to stop on their bicycle.
Some type of device
Not if you're riding with care. Skidding can damage the surface though. And whoever that's in charge of the track might not want to share it with bicyclists.
A race road bike
A Pearl 2001 FXDX Dyna Super Glide Sport