How to Determine the Coefficient of Friction for a Sliding Brick?

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    Ramp Sliding
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Homework Help Overview

The problem involves determining the coefficient of friction for a brick sliding down a ramp, given its mass and acceleration. The original poster presents calculations related to forces acting on the brick but expresses uncertainty about finding the coefficient of friction.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the definition of the coefficient of friction and its relationship to the friction force and normal force. Questions arise about how to calculate the friction force and the net force acting on the brick.

Discussion Status

Some participants have provided guidance on applying Newton's second law to find the net force and subsequently the friction force. The original poster indicates progress in understanding the problem, but no consensus or final solution has been reached.

Contextual Notes

There is a lack of clarity regarding the calculation of the friction force, and the original poster is navigating through the steps of applying the relevant physics concepts. The discussion reflects the challenges of interpreting the problem setup and assumptions about forces involved.

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Homework Statement



A brick is sliding down a ramp

Anet / acceleration = .5 m/s^2
m= 2 kg
M = the coefficient of friction = unknown or ?

The Attempt at a Solution



I'm just stuck on the last part

well first this is my work so far:

90-delta=
90 - 35 = 55

Fg= (2)(-9.8)
Fg= -19.6

Fg x = Fg cos (-) or -19.6 cos 55 = -11.2
Fg y = Fg sin (-) or -19.6 sin 55 = -16.1

Fn= 16.1
---------------

This is where i get stuck.
I don't know how to find M from here
please help me T-T
 
Last edited:
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What quantity is M supposed to designate?
 
M = the coefficient of friction
idk if that helps? :(
 
Well, since the coefficient of friction is defined as M = (Ff/Fn), all you need is to calculate the friction force.
 
last question how do i calculate the friction force? :[
 
Well you know the acceleration of the block and its mass, so first you need to apply Newton's second law to find the net force acting on the block. Then using what you know about the net force calculate the friction force. Fnet = Fgx - Ff.
 
okay i think i got it now

THANK YOU SO MUCH<3333333333
 

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