Atoms
The solid phase state has the lowest kinetic energy because the particles are closely packed together and have the least amount of movement and vibrational energy compared to the liquid and gas phases.
Solids have the lowest amount of kinetic energy compared to liquids and gases. This is because the particles in a solid are packed closely together and have limited freedom of movement, resulting in lower energy levels.
In general, gases have the most kinetic energy, followed by liquids, and then solids have the least kinetic energy. This is because the particles in gases have high energy and move freely, while the particles in liquids have less freedom but more energy than solids, where the particles have the least freedom and lowest energy.
Gases have the highest kinetic energy, followed by liquids, and then solids. -apex
Solids have the lowest kinetic energy as their particles are tightly packed and have limited motion. Liquids have higher kinetic energy than solids as their particles can move past each other. Gases have the highest kinetic energy as their particles are far apart and move freely.
When they are the coldest that they can be is when they have the least energy. Absolute Zero is when molecules have no energy and are not moving, but it is impossible to get to that degree.
The greatest kinetic energy is found in gases because the particles in gases have the highest average kinetic energy due to their high speed and random motion. Liquids have less kinetic energy than gases, while solids and colloids have the lowest kinetic energy as their particles are more closely packed and have less freedom of movement.
at the top of the first hill, just before the first drop
The particles on every state of matter are always in motion, and hence will have a specific amount of kinetic energy both related to their temperature and current state. Solids move less than liquids, liquids less than gasses, etc. At absolute zero, it's theorized that independant molecular movement within any state of matter would cease, and that matter would therefore have no kinetic energy other than being physically moved somewhere by an outside force.
The state of matter than has the least internal kinetic energy (the kinetic energy of all the internal particles relative to the center of mass of the system), or the least internal + macrosopic kinetic energy, is the same state as "Which state of matter has the least thermal energy?". (hint: it's not the gaseous state). However, if you are asking what state of matter has the least macroscopic kinetic energy: Every state of matter can have systems with zero macroscopic kinetic energy. So none of them (or perhaps all of them) have the "least" kinetic energy.
A ball thrown in the air at its lowest point has mostly kinetic energy, which is energy of motion. At the lowest point, the ball's potential energy (due to its height) is minimal while its kinetic energy is maximized.
The kinetic energy is lowest in solids, higher in liquids, and highest in gases.