Cofficient of kinetic friction

[tcf4141]

how do i find it if i am given 20kg sled being pulled with a force of 80N at 30 degrees above the horizontal

 

[alphysicist]

Hi tcf4141,

how do i find it if i am given 20kg sled being pulled with a force of 80N at 30 degrees above the horizontal

I don't believe you can find it with just that information. Did they not give the acceleration?

If they did, what did you try for this problem?

 

[baba89]

The coefficient of kinetic friction is a measure of the resistance to motion between two surfaces in contact. It is denoted by the symbol μ and is typically determined experimentally.

To find the coefficient of kinetic friction in this scenario, you will need to measure the acceleration of the sled while it is being pulled with a force of 80N at a 30 degree angle above the horizontal. This can be done using a force sensor and a motion sensor.

Once you have collected the data, you can use the equation μ = (m*g*sinθ - ma)/N, where m is the mass of the sled (20kg), g is the acceleration due to gravity (9.8 m/s^2), θ is the angle of the force (30 degrees), a is the measured acceleration, and N is the normal force (equal to the weight of the sled).

Solving for μ, you should be able to find the coefficient of kinetic friction between the sled and the surface it is being pulled on. Keep in mind that this value may vary depending on the surface and conditions, so it is important to conduct multiple trials to ensure accuracy.