Forces

Force - A push or a pull on an object changing its velocity. 

There are different type of forces. A push force which is a person or a thing exerting force on a object changing its location and moving an object. The other force is called friction force. Friction occurs when an object resist the push force by getting dragged on a surface. There is weight force which is an object exerting force in the downwards direction due to its weight. The last force is the support force. When an object is placed on a table, the table is exerting support force and when the table is able to hold the object. It is exerting the same or an even greater equal force on the block that is exerting weight force.