Energy, which in the scientific sense is the capacity to do work, is never negative, in the system you describe or in any other system that we have yet been able to observe or devise. What would negative energy mean? You would have to put energy into the system in order to increase the energy to nothing. You would have a system that not only can't do work, it nullifies work, in some manner. That has never been observed. This is not to say that it couldn't exist, but so far we haven't found such a phenomenon.
It sure can be greater. There is no such rule, that states that kinetic energy has to be smaller. A car at ground level has zero potential energy (assuming you choose ground level as your reference level), but when it moves, it has positive kinetic energy.
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Jumping off a tall cliff.
a yo-yo, a car in motion, water falling from a water fall, walking or running, a bullet that has been fired.
the energy due to position potiential energy
On the mountain, before they fall, they have "potential" energy. When they are falling they have "kinetic" energy.
Yes - mechanical energy includes both gravitational potential energy, and kinetic energy. If an object's momentum is zero, then its kinetic energy will also be zero, but its potential energy can be positive or negative, depending on whether the object is above or below the chosen reference level.
*Thermal
sure
motion of particle in conservative field.
Jumping off a tall cliff.
Potential energy is mgh Kinetic energy is .5mv^2 1 ex is a huge rock The rock has potential energy but when it falls the PE turns to Kinetic energy As one decreases the other increases
That would be the total energy of an object. Energy is neither created or destroyed, just converted from one form to another.
The mechanical energy from the engine (with help from electrical energy from the battery), turns the potiential energy of gasoline/petrol into kinetic energy.
Potential - Kinetic - Potiential again as you drop the yo yo, the potential energy it had at its height is converted to kinetic energy. as it starts to come back up, it is converted back to potential energy
A pendulum transfers potential gravitational energy (at the top of its swing) to kinetic energy (movement at the bottom of the swing) and then back again (at the top on the other side).
a yo-yo, a car in motion, water falling from a water fall, walking or running, a bullet that has been fired.
the energy due to position potiential energy
gravity