chemical
An engine converts energy into mechanical motion.
fan converts electric energy into magnetic and further mechanical energy
A bicycle converts mechanical energy generated by pedaling into kinetic energy to propel the bike forward. It can also be considered a form of human-powered transportation, where the energy source is the rider's own physical effort.
An electric fan typically utilizes electrical energy to power its motor, which then converts this energy into mechanical energy to create airflow. So, the energy involved primarily is electrical and mechanical.
An internal combustion engine converts chemical energy into Thermal Energy, and converts thermal energy into mechanical energy via the pistons, connecting rods, and crankshaft .
A generator typically converts mechanical energy (from, for example, fuel combustion or wind) into electrical energy. This electrical energy is then used to power various devices or systems.
A stapler requires mechanical energy to operate. When the handle is pressed down, it converts the mechanical energy into potential energy stored in the spring, which is then released to drive the staple through the paper.
A fan represents mechanical energy, which is the energy associated with the movement of an object. The motor in the fan converts electrical energy into mechanical energy to rotate the blades and create airflow.
A steam engine would be one example, a motor car engine would be another.
Friction typically converts mechanical kinetic energy into thermal energy, also known as heat. This energy transformation occurs due to the resistance created when two surfaces rub against each other, causing the generation of heat as a result of the frictional force.
In a loudspeaker, electrical energy is converted into mechanical energy as the electrical signal from the amplifier is used to move the speaker cone back and forth. This mechanical energy then creates sound waves that travel through the air to produce sound.
A water wheel turning converts the potential energy of flowing water into mechanical energy, which can then be used to drive machinery or generate electricity.