Need help for question about spring oscillation

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Homework Help Overview

The discussion revolves around a question related to spring oscillation, specifically addressing why a particular answer choice is preferred over another in the context of a physics problem involving spring forces and oscillatory motion.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants are examining the forces acting on a block in a spring system, questioning the conditions necessary for sustained oscillation. There is a focus on the role of friction and the net forces involved in the system.

Discussion Status

Some participants have provided insights into the dynamics of the system, particularly regarding the impact of friction on oscillation. There is ongoing exploration of the forces at play and their implications for the motion of the block.

Contextual Notes

Participants are considering the effects of energy dissipation due to friction and how this influences the ability of the system to sustain oscillations. The initial conditions and assumptions about the forces involved are also under scrutiny.

JJ1122
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Homework Statement


I want to know why the answer is C not B. Thanks.

Homework Equations


F=kx

The Attempt at a Solution

 

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JJ1122 said:
. Homework Statement
I want to know why the answer is C not B. Thanks.

Homework Equations


F=kx

1. the force will be -kx , as spring opposes the displacement
draw the force diagram on the block and see what is the net force on the block-ask yourself can it support oscillations of the block or not ?
 
JJ1122 said:
@drvrm Thanks.

but you should give complete argument;
1. initially a displacement say y in the vertical direction will lead to two forces- compression of upper spring will give -ky down ward and extension of lower one will give -ky down ward, as there is significant friction F(friction) will oppose the motion of the mass -pointing up if movement is downward-
after reaching the rest position the energy of the mass will move further down and spring forces will point up but the friction will oppose the motion . so a cycle of oscillation can not be sustained mainly due to energy dissipation .
 

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