Friction - several different kinds - and inertia. If riding uphill, also gravity.
depends on the speeds and weights of the involved vehicles.
Because unless you have a hill to coast down, or a really strong tailwind, you need to pedal to provide a force that can push the bike forward.
is a bike mechanical
In German, you say "Fahrrad fahren" to mean riding a bike.
riding a bike can have an advantage over a plane because if you don't want to pay money than a bike is better and that riding a bike gives you cardio.
When you ride a bicycle, the force of the wheel against the earth causes the earth to push back on the wheel, propelling the bike forward, according to Newton's law of equal and opposite reactions. If the force exerted by the earth is strong enough, it can overcome the inertia of the bike.
on a bike
The person who is riding the bike dies...if you hit him/her hard enough.
Yes it is. I do like riding my bike. I did like riding my bike
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.
Muscles are what makes your body move, whatever you do. So you need them for bike riding too.
Riding a horse can be compared to riding a bike. if you do not have balance, you can throw the horse (or bike) off balance and/or slide off to one side.