Yes. Anything that creates an unbalanced force is an accelerator, as it causes acceleration in the object it affects.
Gas pedal, brakes, steering wheel
No
Yes, the bikes on the tour de France have brakes on each wheel.
They can move heavy things, can be used as brakes and accelerators, read credit cards, and separate compounds.
Yeti bikes are sturdy bikes that are manufactured for mountain riding. They are made with stronger parts and brakes that can withstand the rugged terrain.
No. Some more intended as child's bikes are fitted with coaster brakes.
You could check at a local bike store. There are BMX bikes, mountain bikes, road bikes. The main differences are the types of tires, suspension, and brakes.
No. Not yet, probably not anytime soon.
Most do, but not all. Real track bikes, and some types of BMXes won't have brakes.
It regulates heart activity, acting like brakes and accelerators to decrease or increase the heart rate.
It regulates heart activity, acting like brakes and accelerators to decrease or increase the heart rate. :)
The sheer majority of them have brakes, which sorts that out. Fixies might not have brakes as such, but you can put backpressure on the pedals which will stop the bike eventually. Some BMX trick bikes haven't got brakes, but as long as they're not ridden downhill or in traffic that's not much of a problem.