Forces+and+energy

=FORCES:=

= A force is a PUSH or a PULL  = = = = = = = = = = = = = = = = = = = = = = = = = = Effects of forces: =
 * To start to move something
 * To stop something
 * To speed or slow down something
 * To deform something
 * To break something
 * To change direction of an object

= = = Types of forces =  || **Gravitational Force ** The force of gravity is the force with which the earth, moon, or other massively large object attracts another object towards itself. By definition, this is the weight of the object  || The tension force is the force that is transmitted through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends  || ** Electrical Force ** The interaction between objects due to their charge.
 * =**// CONTACT FORCES //**= || =// **ACTION-AT-A-DISTANCE FORCES** //= ||
 * ** Frictional Force **The friction force is the force exerted by a surface as an object moves across it or makes an effort to move across it. There are at least two types of friction force - sliding and static friction.
 * ** Tension Force **

||
 * ** Air Resistance Force **

The air resistance is a special type of frictional force that acts upon objects as they travel through the air.

|| ** Magnetic Force ** The attraction or repulsion between charged bodies in motion. Esperienced in everyday life through magnets. || An applied force is a force that is applied to an object by a person or another object. If a person is pushing a desk across the room, then there is an applied force acting upon the object.  ||  || The spring force is the force exerted by a compressed or stretched spring upon any object that is attached to it <span style="background-color: #ffffff; color: #444444; font-family: latoregular,Tahoma; font-size: 16px; line-height: 0px; overflow: hidden; text-align: -webkit-center;"> ||  ||
 * <span style="background-color: #ffffff; color: #444444; font-family: latoregular,Tahoma; font-size: 16px;">** Applied Force **
 * <span style="background-color: #ffffff; color: #444444; font-family: latoregular,Tahoma; font-size: 16px; text-align: -webkit-center;">** Spring Force **

= media type="youtube" key="vAThuCmwp9I" width="392" height="219" align="left"media type="youtube" key="WSY4HzWZIlo" width="392" height="219" align="right" = = = = = = = = = = = = = = = = = =MAGNETISM= media type="youtube" key="DR9w4koW2EA" width="560" height="315" **ENERGY** = Types of energy: = =media type="youtube" key="Q0LBegPWzrg" width="560" height="315"= = Energy sources: =
 * Mechanical energy
 * Chemical energy
 * Geothermal energy
 * Electric energy
 * Nuclear energy
 * Solar energy

2. Nonrenewable sources: PETROLEUM - COAL - NATURAL GAS - URANIUM


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