Impossible Physics Problem?

You get the same exact answer as the other poster said: v0 = 18.55m/s

All of you are brainlets except

Doesn't matter if the ball is thrown up. And I don't have it wrong. This is basic physics.

hes right. there are 2 situations here. going up then down. but you use the same reference frame throughout

a_up is the opposite of a_down. you cannot use the same value for both.

if you try to cheat that, youll run into problems later on in physics

"acceleration due to gravity is different going up than it is going down"
Dude I seriously hope you're trolling.

"acceleration is the same in all directions. also acceleration is not a vector."

whos the one trolling?

a_up=-a_down

Since you are either trolling or 100% braindead, I'll put this here for others who don't know:

Acceleration due to gravity is a vector. It is always present, and its magnitude is always 9.81 unless you start to get significantly farther away (orbit) or closer to the center of the earth. Since our frame of reference is (close to)the surface of the earth, this vector is always pointing down, which is in the negative direction. Since these statements are true, acceleration due to gravity always -9.81 m/s and will never change in any basic physics class.

That being said, acceleration due to some other force is completely different. In the OPs scenario, we aren't concerned with the force applied by the person since that becomes 0 as soon as it leaves his hand.

The guy I'm replying to is retarded and should be ignored.

Did I do it right? I'm a brainlet engineer student desu

Yes, if that slop down at the bottom says 18.5 m/s

>Brags about high school GPA
>Brags that he hasn't failed failed an exam in his first semester at big boy school
>Fails his first physics exam

Life's about to get a lot harder for you

Effective gravity on the Earth's surface varies by around 0.7%, from 9.7639 m/s2 on the Nevado Huascarán mountain in Peru to 9.8337 m/s2 at the surface of the Arctic Ocean. In large cities, it ranges from 9.7760 in Kuala Lumpur, Mexico City, and Singapore to 9.825 in Oslo and Helsinki.