No, it's potential energy turning into kinetic energy.
No.
Rolling downhill is potential energy to kinetic energy.
It's potential energy turning into kinetic energy.
First it's chemical energy from eaten food that turns into heat, a little bit of kinetic energy and potential energy(pushing the bike uphill). Then it's potential energy turning into kinetic energy and a little bit of heat, along with some further chemical energy being used up.(coasting down)
It was released as heat
Not after riding a bike, but rather during riding a bike. Your muscles convert chemical energy (a form of potential energy) into mechanical energy to do work.
No. On top of the hill the bike would have potential energy. If released, by letting the bike roll downhill, it'd turn into kinetic energy as the bike picks up speed.
Only if the bike is coasting uphill.
to roll down the hill on a bike without pedaling is called coast or coasting
Yes
You use chemical energy.
Chemical energy
The downhill forks will fit on a normal mountain bike with a little fabrication.
Chemical energy from the food you've eaten.
chemical energy from food the rider has eaten gets turne into kinetic energy as the bike is moving. Then into potential energy as the bike heads uphill. As the bike heads down potential energy turns into kinetic energy.