Frictional Force Homework: Answer B

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Homework Help Overview

The discussion revolves around a problem related to frictional forces, specifically focusing on static friction and its role in determining whether an object will move under certain applied forces.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to calculate the frictional force using the coefficient of static friction and weight, while questioning the correctness of their calculation. Other participants raise doubts about the conditions under which the crate will move, particularly in relation to the applied force and static friction.

Discussion Status

The discussion is ongoing, with participants exploring the relationship between applied forces and static friction. Some guidance has been provided regarding the conditions for movement, but no consensus has been reached on the original poster's calculations.

Contextual Notes

Participants are navigating confusion regarding the definitions of static and kinetic friction, as well as the implications of horizontal forces in the context of the problem.

chawki
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Homework Statement


Ignore the second part on the attachment.


Homework Equations





The Attempt at a Solution


B because
Ff=coefficient of static friction*w
Ff=coefficient of static friction*m*g
Ff=0.30*85*9.8
Ff=249.9N

right?
 

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Do you have doubts? What are they?
 
just making sure..because it was bit confusing when they mentioned the horizontal force and the kinetic friction.
will the crate still move when F is lower than Ff ?
 
The crate will not move until the net horizontal force exceeds the static friction force.
 
ok thank you :)
 

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