Lab Report about Static and kinetic friction

Lab Report about Static and kinetic friction

Abstract

From part 1, it is clear that the plastic tray has a prevalent friction coefficient. These results are consistent all over the experiments, in that both kinetic and static force had the leading values in the plastic bottom tray. The reasonable force on the bottom surface did not influence the coefficient of kinetic friction or static friction. Both kinetic and static friction coefficients rely on the nature of two surfaces making contacts with each other and are autonomous of the reasonable force applied connecting the two surfaces. The pattern of kinetic friction coefficient is usually smaller than the static friction coefficient, indicating the everyday experience that makes it easy to maintain something in motion across a surface that is horizontal that has to start from rest.

Objective

The goals of this lab experiment are to record the kinetic and static frictional forces by the use of a force sensor. To find out the relationship connecting normal force and frictional force acting on an object; take measurements of the coefficients of kinetic and static friction between surfaces to verify that these two figures are autonomous of the normal force.

Background Report`

Whenever an object’s surface slide over another, the purpose wields a frictional force on the other, parallel to the surface. The frictional direction on every purpose is directly opposite to that of its movement relative to the other. Assume that a block of wood rests on a table with the force of gravity of the block equal by a normal force, whereas the direction is opposite to the force of gravity. The normal force applied on an object by a surface when the object is in contact with another object’s surface. A force is exerted on the force of friction on the block, trying to pull it on the right until the block commences to slide. In reaction to this generated force, the force of friction precisely balancing the exerted force is directed to the left. This frictional force is referred to as the static frictional force. As the exerted force amplifies further, the furthest point is reached where the block breaks away from the surface and commences to slide, which indicates that there is a definite maximum figure that the force of static friction can have.

When the exerted force is superior to the maximum force of static friction, the body commences to slide, and it must progress to apply a force to maintain the body sliding. The force acting on the body while sliding is referred to as the kinetic frictional force. Both kinetic and static friction coefficients rely on the nature of two surfaces making contacts with each other and are autonomous of the normal force applied connecting the two surfaces. The pattern of kinetic friction coefficient is usually smaller than the static friction coefficient, indicating the everyday experience that makes it easy to maintain something in motion across a surface that is horizontal that has to start from rest.

Procedures

Connect the force sensor to the computer. Open the software responsible for measuring. Measure the friction tray mass and record the figures. Without tension on the string, push the button labeled “zero” on the force sensor. Place the weight in the friction tray. Connect one endpoint of the string to the tray. Join the other end to the force sensor’s hook. Record the force measurements. Put the friction tray on top of the table. Using the force sensor attached to the tray, gradually pull the friction tray horizontally from where it rests across the table until it attains an unvarying velocity. Progress drawing at a steady speed. After acquiring information, stop the recording and scrutinize it. Find out the utmost kinetic friction force and static friction force, which is the standard value of exerted force in the kinetic friction area. Record the maximum kinetic and static friction into the kinetic and static data table. When the recorded force data is inputted in the table, plot a graph of the input data. Create a linear line for both plots and take measurements of the vertical and slope-intercept. Repeat the process by use of other friction trays.

Results

Part III  Kinetic Friction

Conclusion

It is capable of seeing the impacts of static friction, kinetic friction, and tension on a body. Also, it is easy to take records of static and kinetic friction by using the sensor. The connection between the frictional and normal force was also pointed out in the experiment. It was patent that the two figures of static and kinetic friction were not relying on the normal force. The mass times gravity is equivalent to the normal force.