HRWP45p32

> How do you find the intial velocity in the equation v=at + v0
> if you
don't know the velocity? Because you can't calculate
> the distance since
all the equations with x - x0 either have v or
> v0 and you can't
caluculate v without the distance or v0.

The main clue to this problem is the word "dropped". That is physics code for v0 = 0. Therefore, the solid line is a simple v = -gt.

If you are having trouble, use the apple 1's trajectory to calculate the height of the bridge. Knowing the height and the time of apple 2's fall, you can calculate v0.

--Dr. G.

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Getting homework help:
In order to get help on a homework problem, you need to specify the problem to which you are referring. You start with the book abbreviation (see below), then Q for question and P for problem, then the problem number, finally, p### where ### is the page number on which the problem starts. For instance, for the AP Physics book, the first line of your post might be:

Help needed with HRWP24p10 is problem #24 on page 10 of Halliday, Resnick & Walker.

The abbreviations:
Halliday Resnick & Walker = HRW
Understanding Physics = UP
Mooney = M

Some books might not have page numbers in which case you will use the chapter (e.g., C24.12) along with the book's abbreviation. So

PoPC24.12

If we all follow this procedure, I will be able to help you faster and you will be able to search for help on a problem quickly and accurately.

--Dr. G.