Distance travelled of block, friction, forces

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Homework Help Overview

The discussion revolves around a physics problem involving a block with a mass of 1 kg, a coefficient of static friction of 0.5, and a coefficient of kinetic friction of 0.3. The problem asks about the distance the block can travel when a 7N force is applied, considering the effects of friction.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants discuss the calculation of static frictional force and the net force acting on the block. There are questions about how to incorporate kinetic friction and whether velocity needs to be determined. Some participants suggest redefining the question for clarity and explore the implications of continuous force application.

Discussion Status

The discussion is ongoing, with participants providing insights into the need for clarity in the problem statement. Some guidance has been offered regarding the use of kinetic friction and the equations of motion, but there is no consensus on how to proceed due to ambiguities in the question.

Contextual Notes

Participants note the lack of information regarding the duration of the applied force and the conditions under which the block is moving, which affects the interpretation of the problem.

johnnnnyyy
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Homework Statement


A block of mass 1kg has a coefficient of static friction of .5. If a 7N force is applied to the block what distance can the block travel? Coefficient of kinetic friction is .3


Homework Equations


F=ma


The Attempt at a Solution


I found the static frictional force to be (.5)(9.8)(1)=4.9N so the Fnet of the initial force applied is 2.1N. However I do not know how to find the distance the block traveled from there? Anybody know how to do this?
 
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You know the Coefficient of kinetic friction.Thats what you need here.
 
adjacent said:
You know the Coefficient of kinetic friction.Thats what you need here.

I know that I need to use kinetic friction but I don't how to use it with what I am giving. I think I might need to find velocity but how could I find that?
 
(you may redefine the question with "If a 7N force is applied to the block what distance can the block travel?,Until coming to a stop.
I think your question needs to be a bit clear.
 
Last edited:
adjacent said:
Find the kinetic frictional force and using F=ma,find the deceleration of the block when it is initially traveling with a constant force.(you may redefine the question with "If a 7N force is applied to the block what distance can the block travel?,Until coming to a stop.

Note:you may also need the kinematics equations
V=u+at
s=1/2(u+a)t2
s=ut+1/2at
v2=u2+2as

Using V^2=u^2+2as, I know that V will be 0, a will be 2.94 and s is the distance which am trying to find, I just don't know how to find u.
 
Make your question clear.A Force of 7N is applied for how many seconds?If we keep applying it forever,it won't stop moving at all.
 
As adjacent implies (now) the question makes no sense as it stands. In the absence of further information, there is no limit on how far it can travel.
 

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