Could someone me out ? grade 11 physics ?

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    Grade 11 Physics
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Homework Help Overview

The problem involves a 2 kg sponge dropped from rest, experiencing gravitational pull and air resistance. Participants are discussing how to determine the sponge's speed after 6 seconds, considering the forces acting on it.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Some participants question the clarity of the problem statement, particularly whether it asks for the speed at the end of 6 seconds or during the 6th second. Others suggest considering the effect of air resistance on the acceleration of the sponge.

Discussion Status

Participants are exploring different interpretations of the problem and discussing the appropriate equations to use. Some guidance has been offered regarding the application of Newton's Second Law and the need to account for air resistance in the calculations.

Contextual Notes

There is uncertainty regarding the exact wording of the problem and how it affects the interpretation of the question. The presence of air resistance adds complexity to the analysis.

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Homework Statement


A 2 kg sponge is dropped from rest, pulled down by gravity. how fast will it be traveling in 6 seconds, with a 5 N force of air resistance acting on it ?

Homework Equations


vf= vi+ gt (im just guessing coz I am not sure )

The Attempt at a Solution


the speed in 6 seconds ?? (im not sure what to write here)

so could someone please help me out pleaseeee? thank you!
 
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Welcome to PF!

The wording of the problem is not clear, did you copied it correctly? Was it not "how fast will it be traveling in the 6th second" ?
Anyway, it is said that also air resistance acts on it, in addition to gravity. So what is the acceleration of the sponge? vf=vi+gt is valid when the only force is gravity.
 
First, find the acceleration using the Second Newton Law
Then, use the formula vf= vi + at to get the final velocity (Note : Use negative sign for the opposite direction of the falling ball)
 

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