What is the direction of the impulse in this problem?

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The discussion focuses on a physics problem involving impulse and momentum. The initial calculations correctly determined the magnitude of impulse as 4.28 NS, leading to a final velocity of approximately 39.78 m/s. However, the participant initially misidentified the direction of the impulse. After further consideration, it was clarified that the impulse is actually in the negative direction, resulting in a final velocity of -7.8 m/s. The importance of carefully reading the problem to ascertain direction is emphasized.
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impusle.PNG
1. Homework Statement
In picture above

Homework Equations



impulse = Δp[/B]

The Attempt at a Solution



4.28NS = Δp
4.28NS = pfinal - pinitial
4.28NS + 0.18kg*0.16m/s = pfinal
(4.28NS + 0.18kg*0.16m/s)/.18kg = vfinal
vfinal = 39.77777778m/s

Now i got the direction incorrect but the magnitude correct. i am unsure of how i was supposed to
determine the direction. ?
 

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NEVERMIND I FIGURED IT OUT!
 
The answer is -7.8m/s
 
isukatphysics69 said:
View attachment 224409
Now i got the direction incorrect but the magnitude correct. i am unsure of how i was supposed to
determine the direction. ?
Read the problem more carefully. The impulse is in the negative direction.
 
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