Velocity comparison -- Which thrown mass hits the ground first?

[mathbrain9]

Homework Statement

A person is on a bridge is an object is thrown up at 10m/s with it going to the edge of the bridge. The person throws a 2nd object 10m/s down when the 1st is at the edge. Which makes it first?

Relevant Equations

v= d/t

On the test, I said they hit the ground simultaneously. However, that, in retrospect, doesn't seem to be the correct solution.

 

[Office_Shredder]

Why don't you think that's right?

 

[kuruman]

On the test, I said they hit the ground simultaneously. However, that, in retrospect, doesn't seem to be the correct solution.

What new perspective after the test made you change your mind? It is important that you figure this out because you don't want to second guess yourself when the next test comes around.

 

[haruspex]

Does it specify whether to ignore air resistance?

 

[DrJohn]

What is the velocity of the first object at the instance you throw the second one downwards? Assume we are ignoring air resistance.

As I am unwell, I haven't done any calculations. But I think I know whether your first answer was right or wrong, and someone might do the sums for you eventually to check it.

 

[jbriggs444]

someone might do the sums for you eventually to check it.

The forum rules prohibit any of us from doing those sums until the OP has done so. Meanwhile, the OP has not posted anything beyond the original post here. It would be improper to respond to "I thought the answer was X but now I am not sure" with a correct solution, a full mathematical treatment and the reasoning connecting the two. That would not be fair to the other posters who actually go to the trouble of showing their work.