Question

Explain the tension force and normal force with example and explanation of the example

Answer 1

Normal force is the one that comes to react against the weight on a surface. As when you put something on a table, it reacts in the opposite direction to weight that comes directly vertical. If the table cannot provide the normal force, the body continues to the floor until int founds something that will. The normal force has to be equal to the weight in order to keep it static.


If you incline the table, normal force is still opposite to weight, but just the component perpendicular to the table and there is another one parallel. Why do we do this? Because the moment you incline the table, there must be a force called friction that holds the body in place, otherwise it skips. Friction force depends directly on the perpendicular component of normal force and has to be equal to the parallel component to hold it. If the component of weight is greater than friction it will move down on the inclined table. f in any case will be greater than the parallel component of the weight.


Now for the tension force. It is the kind of force that pulls a body, like the one stablished by strings, or chains. Forces are vectors, and always straight, there are not curved forces


There is also a compression force, like the one shown above. Strings just stand tension and not compression.