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Answer:

Energy

energy, in physics, the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms. There are, moreover, heat and work—i.e., energy in the process of transfer from one body to another.

Difference of kinetic energy and potential energy

The main difference between potential and kinetic energy is that one is the energy of what can be and one is the energy of what is. In other words, potential energy is stationary, with stored energy to be released; kinetic energy is energy in motion, actively using energy for movement.

watt

the SI unit of power, equivalent to one joule per second, corresponding to the rate of consumption of energy in an electric circuit where the potential difference is one volt and the current one ampere.

important to change kinetic energy

The potential energy stored in a body, can be transformed into its kinetic energy. Hence, it is possible to increase the kinetic energy of a body without applying an external force.

Answer:

• Energy is defined as ability to do work.
• Potential energy is the energy possessed due to its position.
• kinetic energy is the energy possessed due to its motion.
• Watt is the unit of Power which is equal to 1 joule per second.
• Yes, kinetic energy can be increased or decreased without applying force.