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## Homework Statement

A particle starts from rest at (r0) = 9m j-hat and moves in the xy-plane with the velocity shown in the figure . The particle passes through a wire hoop located at (r1)=20m i-hat, then continues onward.

https://www.physicsforums.com/attachment.php?attachmentid=7841&stc=1&d=1159234661

The question I'm having trouble with is finding the y-component of velocity at t=4

## Homework Equations

I think it's v = v

_{i}+ a

_{y}delta t

## The Attempt at a Solution

I got -40 (express to only one sig fig) and it was wrong, so I have no idea what to do

Someone please just point me in the direction to go, and not to an older thread