Could someone me out ? grade 11 physics ?

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    Grade 11 Physics
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A 2 kg sponge dropped from rest experiences a 5 N force of air resistance in addition to gravity. The problem's wording may be unclear, particularly regarding whether it asks for the speed at the end of 6 seconds or during the 6th second. To solve the problem, one must first calculate the net acceleration using Newton's Second Law, considering both gravity and air resistance. The correct formula for final velocity, vf = vi + at, should be applied with the appropriate signs for direction. Understanding these concepts is crucial for accurately determining the sponge's speed.
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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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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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