Winding a toy involves storing mechanical energy in a spring or elastic material, which is then converted into kinetic energy as the toy is released, causing it to move.

The potential energy of the raised hammer is converted into kinetic energy as it falls. Upon impact with the nail, this kinetic energy is transferred to the nail, driving it into the wood through the application of mechanical work.

Raising an object increases its potential energy due to its elevated position relative to the ground. This potential energy can then be converted into kinetic energy as the object falls, enabling it to do work.

The kinetic energy of the cricket ball is transferred to the wicket upon impact, causing the wicket to move, demonstrating the conversion of kinetic energy into mechanical work.

Energy is the ability to do work or cause change. It exists in various forms such as kinetic, potential, thermal, chemical, and electromagnetic energy.