How Much Heat is Generated by a Brake Through Friction?

In summary, the amount of heat generated by a brake can be determined by calculating the frictional force, which is equal to the normal load multiplied by the coefficient of friction. The relevant parameters are the normal load, coefficient of friction, and distance, which can be computed using the radius, angular velocity, and time. The area of contact does not affect the calculation.
  • #1
Ziv7
23
0

Homework Statement


I need to find out how much heat is generated by a brake.
I know heat generated = friction
The parameters that will affect it friction are
Normal load (I can choose depending on outcome)
Coefficient of friction (assumed 0.8 between carbon fiber and steel plate)
Area of contact (I can choose depending on outcome)


Homework Equations



I couldn't find relevant equations, which is why i need help in connecting the parameters

Friction = normal load x coefficient of friction ?
 
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  • #2
Frictional force = normal load X coefficient of friction
Work = force X distance

Area of contact is not relevant

BTW: I'm guessing that it you took separated your work from the "problem statement" (per the homework form), you would have gotten more responses.
 
  • #3
Thanks, so is the distance angular velocity x time?
Also, surely the force has to be subject to the coefficient of friction?..
 
  • #4
Ziv7 said:
Thanks, so is the distance angular velocity x time?
Also, surely the force has to be subject to the coefficient of friction?..
The coefficient is part of the computation. You need it to compute the force.

Assuming a drum brake, distance is radius X angular velocity X time.
 
  • #5



The heat generated by friction can be calculated using the formula: Heat = Friction x Distance. In this case, the distance would be the distance traveled by the brake pad on the steel plate. The friction can be calculated using the formula: Friction = Normal load x Coefficient of friction. Therefore, to calculate the heat generated by the brake, you would need to know the normal load, coefficient of friction, and the distance traveled by the brake pad. The normal load can be chosen based on the desired outcome, while the coefficient of friction can be assumed to be 0.8 for carbon fiber and steel. The area of contact can also be chosen based on the desired outcome.
 

FAQ: How Much Heat is Generated by a Brake Through Friction?

What is friction and how does it affect heat calculation?

Friction is a force that opposes the movement of objects or materials in contact with each other. It is caused by the interaction between the surface of two objects and can result in heat generation. In heat calculation, friction is taken into account as it can affect the amount of heat produced or dissipated in a system.

How is friction coefficient determined for heat calculation?

The friction coefficient is determined experimentally by measuring the force required to move an object over a surface at a constant speed. This force is divided by the weight of the object to obtain the coefficient of friction. This value is then used in heat calculation equations to account for the effects of friction.

What are the different types of friction and how do they impact heat calculation?

The three main types of friction are static, kinetic, and rolling friction. Static friction occurs when two surfaces are not moving relative to each other, kinetic friction occurs when two surfaces are sliding against each other, and rolling friction occurs when an object is rolling over a surface. Each type of friction impacts heat calculation differently and must be accounted for in different ways.

How do materials with different coefficients of friction affect heat calculation?

Materials with different coefficients of friction will have varying levels of resistance to movement, resulting in different amounts of friction and heat generation. In heat calculation, these differences must be taken into account in order to accurately predict the amount of heat produced or dissipated in a system.

Can friction ever be beneficial in heat calculation?

Yes, friction can be beneficial in certain cases. For example, friction can be used to generate heat in machines such as brakes, which use friction to slow down and stop moving objects. In these cases, the amount of friction must be carefully calculated and controlled to ensure optimal heat generation without causing damage or excessive wear on the materials involved.

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