Lab report: friction

In the last experiment, relation between mass of an object or the net force with acceleration was defined. Another type of force acting on a system is to be discussed in this experiment. When two objects interact by touching or contacting each other, interaction is said to be subjected to contact forces.

Among those contact forces, we have normal force and frictional force. Normal forces are forces acting perpendicularly towards the object. It is due to molecules of the surface is resisting the molecules of the object squeezed on it. Principal concern in this experiment is he frictional force.

At those times that the object is not yet moving, static frictional force is present. It is not constant. We added some load but still, it is not yet moving. By that, static frictional force is equal to the force to the tension force applied thus, capable of contradicting the force.

The static frictional force will continually increase as load is added until it reaches the maximum force that the static frictional force can exert. It is also known as (fs)max. When a frictional force is at its maximum, the body in question will either be moving or will be on the verge of moving.