Energy is defined as “capacity for doing work”. Energy is needed for all activities that are performed by the muscles when stimulated by the nervous system. Contraction of the muscles causes movements around the joints. These movements when properly coordinated result in some types of skill performance such as jumping, kicking, clapping, running, throwing, dancing, […]
Energy is the ability to do work or get work done. Energy is used to lift things, to heat up our food, give us light, power the car and generators etc. A machine is an energy changer. It changes one form of energy into another more useful form. Something only happens when energy is changed
LIGHT ENERGY Light energy is a form of electromagnetic radiation. Light consists of photons, which are produced when an object’s atoms heat up. Light travels in waves and is the only form of energy visible to the human eye. SOURCES OF ENERGY Sun Electric bulb Explosion Flame LED (Light Emitting Diode) Fire Moon Tube
Heat Energy Thermal energy is created from the vibration of atoms and molecules within substances. The faster they move the more energy they possess and the hotter they become. Thermal energy is also called heat energy. Chemical Energy Chemical energy is stored in the bonds of atoms and molecules – it is the energy that
Energy This is the ability to do work. Forms of energy. Chemical energy: – this is found in foods, oils charcoal firewood etc. Mechanical energy:– there are two types; Potential energy – a body possesses potential energy due to its relative position or state Kinetic energy – energy possessed by a body due to its motion
ENERGY, WORK, POWER AND MACHINES Read More »