Force and pressure

Force is the push or the pull acting on an object. In our daily life situation so many situations we are applying force, knowingly or unknowingly. Here are several situations where we will apply force 1.Lifting a book. 2.kicking a ball. 3.opening the door. etc THE EFFECTS OF FORCE 1.force can change the state of an object from rest to motion and motion to rest. 2.force can change the shape of an object. 3.force can change the speed of moving object. 4.force can change the direction of an object.

Forces are of two types, CONTACT AND NON CONTACT FORCE.

CONTACT FORCE:Force exerted when the objects are in contact with each other.they are MUSCULAR FORCE:Force due to the action of muscles. lifting a bucket of water FRICTIONAL FORCE:Force exerted when the surfaces of the objects are in contact. rolling ball stops after stops after time

NON CONTACT FORCE:Force exerted when the objects are not in contact. examples. ELECTROSTATIC FORCE:A charged body attracts a charged or uncharged body. hair gets attracted to the balloons MAGNETIC FORCE:Force of attraction between the magnets. two magnets attracts each other. GRAVITATIONAL FORCE:Force exerted by the earth on other objects. mango falls from a mango tree. https://www.youtube.com/watch?v=uoKo3DbfYZk this link gives more information about the force.

PRESSURE The force acting per unit area is called pressure.Pressure depends on inversely area and directly on force.There are solid pressure,liquid pressure,atmospheric pressure.Among this atmospheric pressure is more stronger than others it depends on height. http://gradestack.com/CBSE-Class-8th-Complete/Force-and-Pressure/Atmospheric-Pressure/14792-2855-2710-study-wtw This link will give more about atmospheric pressure. The liquid pressure also depends on the height of liquid column. For the solid pressure the as the area increases the pressure decreases.