Discussion Questions: Answer the Testable Question. – How does the roughness of a surface affect the coefficient of static friction and the coefficient of kinetic friction for a block of wood, and how do these coefficients compare with each other?
From the ‘Results’ section above, as the roughness of a surface increases, the coefficients of friction for the block of wood increases. This can be concluded as the surfaces used in order of lowest roughness to highest roughness were the white surface, wooden surface and lastly the sandpaper surface had coefficients of friction increasing in the same order. For instance, to compare the static coefficients of the first trial of each surface in order of roughness, 0.20< 0.32. Therefore, corresponding with the coefficients of static friction, the coefficients of kinetic friction also increases as the roughness of the surface increases. In conclusion, from the data collected, the observation was that as the roughness of a surface increases, the coefficient of static friction and the coefficient of kinetic friction for a block of wood will increase.
In terms of the variables in this experiment, what type of relationship was being tested?
In this experiment, the relationship of the variable force of friction and the coefficient of static and coefficient of kinetic friction are being tested. From the formula:μk=(Ff,k)/Fn, and μs=(Ff,s max)/Fn, the coefficients of friction are equal to the force of friction divided by the normal
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A correlation test is done to show the correlation between the manipulated and responding variables of this experiment.
What material generates the most friction? If a piece of sandpaper under a block of wood goes down a wooden ramp, then it will generate the most kinetic friction. The independent variable is the material placed under the block of wood. The control group is the wood block going down the ramp itself. The experimental group is the materials going on the ramp. The dependent variable is the time. The incline of the ramp, the size of the materials, and the block of wood, are the control groups. The first procedure was to set the materials in a wide open area. Second, place block of pine wood at the top of the ramp and time how long it takes to get from the top to the bottom of the ramp. Third, repeat step the second step three times and record the
The two types of friction of the mousetrap car are rolling friction and static friction are the two types of friction that may affect the performance of the mousetrap car. The problem of the friction did I encounter and how do you solve them one types of friction i encounter was the static friction I had to take off some glue from the stick that had my wheels and to open eye screws. The factor did take into account to decide the number of wheels you decide to chose for the mousetrap car I saw a video of a car that had 4 wheels and it ran really fast, so I thought a 4 wheeled car would run fast or at least the four meters. What kind of wheels did I use in each axles I use tires as my wheels on each axles. I think the affects on using big wheels
In the actual study reported in this article, describe the experimental and the control groups. What is the dependent variable?
After analysis of the data, it was found that our hypothesis is true in which the static and kinetic friction is affected by the mass of the object. The force of friction is dependent on normal force. Coefficient were s= 0.9999 and k=0.99954 and it will never be bigger than 1. The coefficient of kinetic friction is always
I utilized the coefficient of friction values based on skid testing conducted by the Institute of Police Technology and Management, (IPTM). IPTM testing, indicates a coefficient of friction of .90 - 1.50 for a vehicle furrowing.
Will different gloves with different amounts of friction have an affect on the amount of times a football is caught? If more friction is used, the amount of passes caught will increase, and the amount of passes dropped will decrease when the catch rate is the function of the gloves being used. The independent variable of this experiment is the amount of friction of different gloves. The dependent variable will be the amount of times the football is caught after being thrown. The experimental control will be using no gloves to add friction, and measuring the amount of passes caught.
First, laboratory experiments. Laboratory experiments are research methods that help to establish cause-effect relationship between two variables. They are applied for developing the casual relationship of manipulated variables which help to increase psychological
In 4.1 you will have 5 different surfaces, you will have to slide the block over each surface 4 times the the spring scale reading newtons. After when you are all you will have to average the number you got. Like for table top trail 1(.75) trail 2(.75) trail 3( 1) trail 4(,75) add them up and divide by three 0.81(N). The average for waxed paper was 0.43(N), for paper towel 0.37(N), fine sand paper 1.56(N) and coarse
The experiment questioned how far the students would obey Mr. Jones and if the structure of discipline and uniformity were a need. The independent variable would be the different types of discipline that he taught his students and the dependent variable would be their
Research methods are put to the test with the help of an experiment. An experiment is composes of a manipulation with an independent variable and an unplanned task of conditions to a contributor. Using both of these components confirms a strong experiment. The independent variable, is well known as, the changing
A cart of mass (m) is released from rest on a frictionless ramp. Apply your previous knowledge about energy and motion on frictionless tracks to determine what will happen if the initial height (h) of the cart is larger than the diameter of the loop-the-loop. Choose all that apply. (Apply)
Friction happens when “a force created by two surfaces or fluids coming in contact with each other” (Weyers, n.d.). The equation for friction is F = µN or Force of Friction = coefficient of friction multiplied by