Motion and Heat

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How does energy relate to motion and heat? Motion and heat are just different forms of energy. Want to learn more? Read on.

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Motion and Heat

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Machines and living things convert stored energy to motion and heat. Energy from the Sun can be changed into other forms of energy. Electricity comes from several sources, but all of them can be traced back to energy from the Sun. Electricity is carried through wires to places where it is used, like our homes. Here it is changed into heat, light, motion and other forms.

Heat from light

Machines use energy to produce motion and heat. Fuel is the energy source, which a car, plane, train or a boat uses to produce motion. Have you touched the hood of a car after a long trip? As the engine converts the fuel into motion, heat is also produced.

Heat from fuel

Humans and animals convert food energy into the energy of motion and heat, when you eat a turkey sandwich, the energy contained in it gives you the energy, you need to walk, play football or run across the schoolyard. The body also uses the food to produce thermal energy to keep you warm, when you play outside on a cold day, you gradually feel warm because the energy of motion produces heat. So it is better to move around on cold days than to stand still.

Body and heat                             Motion and Heat                            Exercise and Heat

Energy is the ability to do work and to cause something to move and change. Energy can be found in several forms, chemical and mechanical. Living things and machines cannot work without energy. Forms of energy can be transferred from one form to another, but Energy cannot be created or destroyed. The use of Energy and the loss of Energy usually end up as Heat.

Motion:  Motion is a change in the position or location of an object with respect to time.

Heat:  Heat is a form of energy that is generated by a difference in temperature.

Energy and motion: Energy is needed to cause changes. This can involve changing the shape of matter, or changing the speed or direction of an object’s motion.

Examples associated with energy of motion, such as walking and running, water wheels, wind-up toys, windmills, toy cars and trucks, rolling or thrown balls, motors, vibrating devices (like a doorbell or buzzer), vibrating strings on a guitar or other musical instruments.

Walking and exercise                                                     Rafting and exercise

There are two types of energy:

1. Potential Energy- It is the energy possessed by the body by virtue of its position.

Potential energy

2. Kinetic Energy- It is the energy possessed by the body by virtue of its motion.

Kinetic energy

Potential Energy is stored energy, or energy of position. Anything may have stored energy that gives it the potential to cause change, if certain conditions are met. The amount of Potential Energy that a sample of matter has depends on its position or condition. Springs in toys are the example of potential energy.

Potential Energy is changed to Kinetic Energy upon movement. Kinetic Energy is energy in the form of motion.

Simple Machines: Simple machines help us make better use of our muscle power to do work. A machine produces force and controls the direction of force. It cannot create energy. Simple Machines help us lift, pull, increase elevation of heavy things, change the direction of the force, increase the force, split things, fasten things, and cut things.

Motion and Heat                               Simple machines

We all use simple machines everyday for opening a door, turning on the water faucet, going up the stairs, or opening a can of paint.

 

 

Books on Energy, Heat and Motion

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Other links on Energy, Heat and Motion

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Make your own hot air balloon http://www.fi.edu/flights/own2/weight-balloon.html
Wind Power Gathers Speed http://www.science.org.au/nova/037/037box03.htm
Hotter or Colder (interactive) http://www.bbc.co.uk/schools/podsmission/solidsandliquids/
 

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