The frictional coefficients, mu, depend on the surfaces in contact. Oct 03, 2019 some of the worksheets below are coefficient of friction problems worksheet with answers, several calculations involving coefficient of friction, types of friction like rolling friction, sliding friction, fluid friction, static and kinetic friction. If the puck feels a normal force f n of 5 n, what is the frictional force that acts on the puck. Jun 22, 2016 which brings us to coefficients of friction. Pratical or lab worksheet with theory and instructions to student.
In this science worksheet, your child will interpret data in a table to determine which surfaces produce the most friction. This quiz and worksheet will gauge your knowledge of net force and how to apply it. Unlike the static friction force, the kinetic friction force does not change in magnitude. What is the force that opposes the movement of an object.
Pdf the coefficient of friction, particularly of ice. A 20 kg box is being pulled across a floor by a horizontal rope. The force of friction lab investigation is divided into 3 sections surface type 6. The coefficient of kinetic friction is a dimensionless quantity no units that. A hockey puck has a coefficient of kinetic friction of. The static and dynamic coefficients of friction are defined, and values from 0. Phys 1030l friction work and the inclined plane utc. Coefficient of friction problems worksheet with answers.
The contact force between the surfaces normal force fn b. Every pump operators basic equation fire engineering. Given that the particle is on the point of slipping, what is the coefficient of friction, between the particle and the plane. A short table is included above the main table to illustrate how the. Define and calculate the coefficients of kinetic and static friction, and give the relationship of friction to the normal force. The coefficient of static friction between the box and the surface is 0. Determine whether the block is in equilibrium and find the value of the friction force. Access the answers to hundreds of friction questions that are explained in a way thats easy for you to understand. Thus, the static coefficient of friction concerns the force restricting the movement of an object that is stationary on a relatively smooth, hard surface.
Coefficient friction worksheet elegant cchemistry forces vectors from coefficient of friction worksheet answers, source friction coefficients are nearly constant for any particular interface. Minisim simulator science journals or notebooks calculations from the previous day activity step by step. If the puck feels a normal force fn of 5 n, what is the frictional force that acts on the puck. Some of the worksheets below are coefficient of friction problems worksheet with answers, several calculations involving coefficient of friction, types of friction like rolling friction, sliding friction, fluid friction, static and kinetic friction. Use the following steps to complete the activity and in complete. If the normal force acting on the object is 153 n and the coefficient of kinetic friction between the.
Once you calculate the coefficients of friction, you can refer back to table 1to identify the materials in contact. A crate weighing 600 n is being pushed across a level floor at a speed of 5. In a tugofwar contest on a firm, horizontal sandy beach, team a consists of six players with an average mass of 65 kg and team b consists of five players with an average mass of 84 kg. Spreadsheet use for pipe flow friction factor calculations. Extreme care is needed in using friction coefficients. The types of surfaces the us coefficient of static friction no units. Use the following materials to complete the activity stated below. The coefficient of sliding friction between rubber tires and wet pavement is 0. Find the coefficients of static and kinetic friction between the object and the floor. Forces acting at an angle with friction mathcentre. John is pushing horizontally on a 100 kg bench with a force of 380 newtons.
Forces of friction l when an object is in motion on a surface or through a viscous medium, there will be a resistance to the motion l this is due to the interactions between the object and its environment l this resistance is called the force of friction. I had no idea what this meant or how to calculate this and after some googling, i found the explanations and formulas made my head spin. With many brake materials the dynamic coefficient of friction quoted is an average value when the material is subject to a range of sliding speeds, surface. If the coefficient of static friction is s, calculate the force required to move the box.
N, what is the frictional force that acts on the puck. September 2003 slide 383 driveroperator 1b fl coefficients c factors refer to the third principle of friction loss the base of the friction loss equation. Mar 22, 2019 coefficient friction worksheet elegant cchemistry forces vectors from coefficient of friction worksheet answers, source friction coefficients are nearly constant for any particular interface. The normal force rn the nature of the surfaces involved ffriction. Friction and cohesion coefficients of composite concreteto. For any specific application the ideal method of determining the coefficient of friction is by trials.
The coefficient of friction depends on the materials used. To remove a fractional coefficient you may divide each term in the equation by the coefficient or multiply each term by the reciprocal of the coefficient. Fl c x q2ll c coefficient for hose diameter q quantity l length. Analysis a copy table 2into your notebook and add three columns, two to record the calculated coefficients of static friction and kinetic friction, and a. Solve friction problems information sheet the friction model. To measure the coefficient of static and kinetic friction between a block and an inclined plane and to examine the relationship between the planes angle. Apply the concepts of static and kinetic friction to problems involving constant motion or impending motion. September 2003 slide 383 driveroperator 1b fl coefficients c factors refer to the third principle of friction loss the base of the friction loss equation assigned based on the diameter of the hose fl decreases as diameter increases. Basically, the coefficient of friction describes how easily a single object is able to move over another. A lot of friction can sometimes be useful in our everyday lives, but at other times it can be a nuisance and not helpful at all.
Speed combined forces in one dimension newtons laws friction the focus of the worksheet is the forces portion newtons laws, friction, combined forces, with only a few probl. If maximum friction force is less than friction force required for equilibrium, block will slide. A 25 kg block is initially at rest on a rough, horizontal surface. Suppose a 10 n force is applied to the side of a 4. Typical coefficient of friction values for common materials. Every pump operators basic equation by paul spurgeon continuing education course to earn continuing education credits, you must successfully complete the course examination. Normal force and friction council rock school district. Force and friction worksheets teachers pay teachers. This is a very simplistic statement and quite misleading for brake materials.
Table 1 lists the coefficients of static and kinetic friction for various objectsurface combinations. Friction is sometimes helpful and sometimes not helpful at all. Since we have the mass and the coefficient of friction, we had better solve for the force of friction because you never know when that might come handy. In this worksheet, students are asked to demonstrate knowledge of a variety of forces and motion topics, including. Friction investigation worksheet teaching resources. Worksheet goes from the powerpoint to the video questions. The static and kinetic friction coefficient values reference table shown in this article will be helpful for finding the cof values of commonly used materials. Learners complete a set of activities to explore the relationship between friction and gravity. This same concept is useful in solving onestep equations with fractional coefficients. Nov 16, 2016 pratical or lab worksheet with theory and instructions to student. Coefficient of friction worksheet answers briefencounters. Given a force of 50 n acts on the particle at an angle of 40 above the horizontal, does. Friction and friction coefficients engineering toolbox.
Weight, the normal force, and the force of friction. Normal force, frictional force and coefficient of friction between the box and the sidewalk. If the coefficient of kinetic friction between a crate and the floor is 0. Can the coefficient of friction ever be greater than one. Rn the friction force does not depend on the surface area.
A horizontal force of 75 n is required to set the block in motion, and a 60 n force is required to keep it in motion at a constant speed once it is moving. Friction action force friction the friction force acts in a direction parallel to the area of contact, and opposes the motion or the tendency to move. Groups make conclusions about the factors that affect the amount and type of friction between surfaces. Define and calculate the coefficients of kinetic and static friction, and give the. Students determine the motion of an object with a certain coefficient of friction.
R where f is the friction force acting between two surfaces in contact. The coefficient of static friction is less than that of kinetic. D for four different portions of the moody diagram. Calculate the magn itude of the horizontal force required to move the crate across the floor at constant speed. A short table is included above the main table to illustrate how the coefficient of friction is affected by surface films. Fm psn further increase in p causes the block to begin to move as f drops to a smaller kineticfriction force f k. Next, you will measure the coefficient of kinetic friction between two.
What is the coefficient of friction acting on the brakes. Static and kinetic coefficients of friction by experiment. The brakes are applied to a 750kg car travelling 30. As p increases, staticfriction force f increases as well until it reaches a maximum value f m. Coefficients of friction range from near zero to greater than one. Friction force tangent to the surfaces of contact is developed both during the interval leading up to impending slippage and while slippage takes place.
In this forces worksheet, students calculate the tension and acceleration of an object on a frictionless table. A simple worksheet to accompany an investigation about measuring the force needed to pull an object over different surfaces to identify the different levels of friction they have. The friction coefficients reported in literature are characterized by large variability of the data. It is commonly thought that the static coefficients of friction are higher than the dynamic or kinetic values. F k k f n f k maximum static frictional force before movement is caused.
334 369 1421 204 1383 333 759 928 829 1479 831 1339 719 364 176 61 1268 447 489 1312 1285 1427 715 1413 1020 1171 1491 1096 56 709 719 983 1168 123 997 211 831 1380 474 1391