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Resistive Force Formula:
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Resistive force, also known as frictional force, is the force that opposes the motion of an object when it moves across a surface. It is calculated using the coefficient of friction and the normal reaction force acting on the object.
The calculator uses the resistive force formula:
Where:
Explanation: The resistive force depends on both the nature of the surfaces in contact (represented by μ) and the force pressing the surfaces together (normal force R).
Details: Calculating resistive force is essential for understanding motion dynamics, designing mechanical systems, predicting stopping distances, and analyzing energy losses due to friction in various physical systems.
Tips: Enter the coefficient of friction (typically between 0 and 1) and the normal reaction force in newtons. Both values must be positive numbers greater than zero.
Q1: What is the coefficient of friction?
A: The coefficient of friction (μ) 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: For most materials, μ ranges from 0.05 (very slippery) to 1.0 (high friction). Ice on ice is around 0.03, while rubber on concrete can be 0.6-0.9.
Q3: What is normal reaction force?
A: The normal reaction force is the force exerted by a surface perpendicular to the object resting on it, typically equal to the object's weight on a horizontal surface.
Q4: Does resistive force depend on surface area?
A: For most practical purposes, resistive force is independent of the surface area of contact between the two objects.
Q5: What's the difference between static and kinetic friction?
A: Static friction acts when objects are stationary, while kinetic friction acts when objects are moving. Static friction is generally greater than kinetic friction.