How to Find the Kinetic Friction Force and Coefficient?

AI Thread Summary
To find the kinetic friction force and coefficient of kinetic friction (μk), the formula f = Fn * μk is essential, where f represents the friction force and Fn is the normal force. Given the mass (0.1342 kg) and acceleration (-0.0145 m/s²), the net force can be calculated using Fnet = ma. The normal force (Fn) on a flat surface equals the weight of the object, which is the mass multiplied by gravity (approximately 9.81 m/s²). By substituting the friction force into the net force equation, one can solve for μk. Providing a complete scenario and showing initial attempts at solving the problem is crucial for effective assistance.
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Homework Statement


find the Kinetic Friction force in N and the μk
Acceleration-.0145
mass .1342kg

i need to solve many so can you solve this and show the formula
 
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You're going to have to give more information than this. What is the scenario? Follow the template given when posting. Also, you're going to have to show an attempt. We do not just give answers.
 
there is not a lot more information it only gives me the acceleration and the mass of the the object across the flat surface. i tried the kinetic friction force but am not sure if i used the right formula and have no idea how to use the μk formula
 
Okay, in order to find the coefficient of kinetic friction you need to know the formula f=Fn*uk, where f is the friction force, Fn is the normal force, and uk is the coefficient of kinetic friction. When you write your net force equation (Fnet=ma) you will be able to substitute this equation in place of f and solve for uk.
 

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