Calculating Coefficient of Friction for a Pulley System

In summary, the conversation discusses determining the coefficient of friction for a block being pulled across a wooden surface at a constant speed via a pulley system. The mass of the block on the surface is unknown and needs to be determined in order to calculate the coefficient. The friction is measured to be 1.03N and the equation used is 1.03N = m2/m1(m1g). However, when solving for m1, a value of one is obtained instead of the expected value of 0.3160kg. Clarification is needed on the setup of the experiment and the meaning of the given values.
  • #1
jrab
9
0

Homework Statement



if i am missing something that prevents you from answering and let me know ill try and add it

A block pulls another block across a wooden surface via a pulley at a constant speed. the surface is horizontal
the mass of the block on the horizontal surface is unknown. determine kinetic co efficient of friction.

friction was determined to be 1.03N

Ff=F2g<-- force of masses pulling down on string (since its constant f2g or the fa must equal friction in order to get a net force of zero)

coefficient is equal to mass2/mass1

i have this equation of

1.03N=m2/m1(m1g)

m2 is equal to 0.1051kg

when i try to solve for m1 i get a value of one, we measured the mass with a scale and it is around .3160kg, what am i doing wrong.

sorry if i left anything out just let me know
 
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  • #2
i don't understand what you're doing :confused:

is this a block of mass m1 on a horizontal table attached by a rope over a frictionless pulley to a another mass m2 hanging vertically, with m2 given as 0.1051kg?

is the rope horizontal, or at an angle?

what is the 1.03N supposed to be (it's obviously not the coefficient of friction)? how did you measure it?

what does "1.03N=m2/m1(m1g)" mean?
 

FAQ: Calculating Coefficient of Friction for a Pulley System

What is the coefficient of friction?

The coefficient of friction is a measure of the force required to move one surface over another. It is a dimensionless quantity and is typically represented by the symbol μ (mu).

How is the coefficient of friction determined?

The coefficient of friction can be determined by conducting experiments where one surface is moved over another with a known force. The ratio of the force required to move the surfaces to the normal force between the two surfaces is the coefficient of friction.

What factors affect the coefficient of friction?

The coefficient of friction can be affected by several factors, including the nature of the surfaces in contact, the roughness of the surfaces, and the presence of any lubricants or contaminants.

Why is the coefficient of friction important?

The coefficient of friction is an important concept in physics and engineering as it helps in understanding the forces involved in motion and in designing machines that can minimize frictional forces for efficient operation.

How does the coefficient of friction differ from static and kinetic friction?

The coefficient of friction is a measure of the frictional force between two surfaces in contact, whereas static and kinetic friction are types of frictional forces. Static friction refers to the force that must be overcome to get an object to start moving, while kinetic friction is the force that opposes the motion of a moving object.

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