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Frictional Resistance Force Formula:
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Frictional resistance force (F_r) is the force that opposes the relative motion or tendency of such motion of two surfaces in contact. It is calculated using the coefficient of friction (µ) and the normal force (N) acting between the surfaces.
The calculator uses the frictional force formula:
Where:
Explanation: The frictional force is directly proportional to both the coefficient of friction and the normal force pressing the surfaces together.
Details: Calculating frictional resistance force is essential in engineering design, mechanical systems, vehicle dynamics, and understanding everyday phenomena like walking, braking, and object stability.
Tips: Enter the coefficient of friction (typically between 0 and 1 for most materials) and the normal force in newtons. Both values must be positive numbers.
Q1: What is the coefficient of friction?
A: The coefficient of friction is a dimensionless value that represents the ratio of the force of friction between two bodies and the force pressing them together.
Q2: What are typical values for coefficient of friction?
A: Rubber on dry concrete: 0.6-0.9, Steel on steel: 0.5-0.8, Ice on ice: 0.01-0.03, Teflon on Teflon: 0.04.
Q3: What is normal force?
A: The normal force is the component of contact force that is perpendicular to the surface that an object contacts, typically equal to the weight of the object on horizontal surfaces.
Q4: Does friction depend on surface area?
A: For most practical purposes, frictional force is independent of the apparent area of contact between surfaces.
Q5: What is the difference between static and kinetic friction?
A: Static friction acts on objects that are not moving, while kinetic friction acts on objects in motion. Static friction is generally greater than kinetic friction.