# Calculating Viscous Friction Coefficient b

• nothGing
In summary, the formula for calculating viscous friction coefficient b is: b = (F/m) / (v/t), where F is the force applied, m is the mass of the object, v is the velocity of the object, and t is the time the force was applied. The force can be measured using a force sensor or a spring scale, with the value recorded in newtons (N). The viscous friction coefficient b cannot be negative, as it is a measure of resistance to motion caused by the interaction between the object and surrounding fluid. The mass of the object has a direct relationship with the value of b, with a heavier object experiencing more resistance. The units for b depend on the units used for force, mass,
nothGing
hi..
may i ask what is the relationship(formula) between the viscous friction and the frequency?
if i know the value of k(spring constant), M(mass), and f(frequency), am i able to find out friction coefficient, b?

wrong subforum i think

err..
u mean should post in subforum "general phy", izit?
Actually this question is related with differential equation, so i just post at here.

yeah, but if it's specifically for something physical, it should go in physics

(my interpretation)

Hello,

Thank you for your question. The relationship between viscous friction and frequency can be described by the equation:

b = 2πfM

Where b is the viscous friction coefficient, f is the frequency, and M is the mass. This equation is derived from the equation for the viscous damping force, which is equal to -bv, where v is the velocity.

So, if you know the values of k, M, and f, you can indeed calculate the viscous friction coefficient b using the above equation. I hope this helps! Let me know if you have any other questions.

## 1. What is the formula for calculating viscous friction coefficient b?

The formula for calculating viscous friction coefficient b is: b = (F/m) / (v/t), where F is the force applied, m is the mass of the object, v is the velocity of the object, and t is the time the force was applied.

## 2. How do you measure the force applied for calculating b?

The force can be measured using a force sensor or a spring scale. The object should be placed on a frictionless surface and the force is applied in the direction of motion. The value of the force should be recorded in newtons (N).

## 3. Can the viscous friction coefficient b be negative?

No, the viscous friction coefficient b cannot be negative. It is a measure of the resistance to motion caused by the interaction between the object and the surrounding fluid. A negative value would indicate that the fluid is assisting the motion of the object, which is not possible.

## 4. How does the mass of the object affect the value of b?

The mass of the object has a direct relationship with the value of b. As the mass increases, the value of b also increases. This is because a heavier object will experience more resistance from the surrounding fluid compared to a lighter object at the same velocity.

## 5. What units are used for the viscous friction coefficient b?

The units for the viscous friction coefficient b depend on the units used for force, mass, velocity, and time in the formula. Commonly used units include Ns/m (newton-second per meter) or kg/s (kilogram per second).

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