Technically, an object moving at a constant speed on a flat surface doesn't gain or lose any energy. (Also technically, energy is never 'consumed'; it only changes from one form to another, or gets transfered from one body to another.) If a car and a bicycle both roll down the same ramp, the car has more energy of motion when they reach the bottom. If a car and a bicycle are both standing at a stop light, both take off when the light changes, and both accelerate together to 10 mph, the caruses more energy than the bicycle to get up to the same speed.
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Kinetic energy is the energy of moving things, And a bicycle in use is a moving thing.
Yes, a moving bicycle has kinetic energy. Kinetic energy is the energy possessed by an object due to its motion. As the bicycle moves, it possesses kinetic energy that is dependent on its mass and velocity.
Mechanical energy
the brakes on a bicycle when used turn kinetic energy into chemical energy.
A bicycle gives off kinetic energy when it is in motion, as the energy of its moving parts is transferred to the surrounding environment. The rider's pedaling also generates some heat energy, but the predominant form of energy given off by a bicycle is kinetic energy.
Potential energy, and then the chemical energy in its material.A stopped bicycle doesn't have much energy. It does (almost always) have some flammable parts which contain potential chemical energy. Even when stopped, if it is standing up it has some gravitation potential energy that would be released if it fell over. The inflated tires have some amount of elastic energy. Compressed air in the tires has some energy content. None of this amounts to very much, in comparison to the energy of a moving bicycle.
You are not moving relative to the bicycle.
Moving an object through a distance transfers energy from one form to another. The work done on the object to move it creates a transfer of energy, which can manifest as kinetic energy in the object itself or as potential energy within the system.
There is no change. The bike is moving along a horizontal surface, and only a change in height can change the gravitational PE.
It is your momentum of moving forward that has to be overcome before your brakes can bring the bicycle to a stop.
A truck moving at 60 mph has more kinetic mechanical energy than a bicycle moving at 15 mph due to the truck's higher mass and velocity. Kinetic energy is proportional to an object's mass and to the square of its velocity.