- #1

JJ91284

- 7

- 0

I've got a homework packet that I've been working on that's due tomorrow afternoon. I was planning on visiting the physics tutoring center today on campus, but everything is shut down because of the 21" of snow that we got last night.

I have 3 problems that I've been staring at for the last hour or more and I just don't know how to proceed. Normally I have no issues what so ever when data is given. These problems don't have definite numbers so I'm struggling on how to even proceed.

Any guidance on how to get going would be appreciated

Normally I use these 4 equations and I just manipulate the equations and they work great.

X=X0+V0t+.5at2

V=V0+at

V2=V02+2aΔX

S=d/t

I'm attaching 3 links so you can see my physics problems. One last question I'd like to ask just to make sure I answered another problem correctly in my packet. When a problem asks when is its velocity greatest. Do you always go with the the highest positive number, or do you factor in a negative value as well. I know speed doesn't matter which direction your going. Velocity sign (+ or -) on the other hand indicates which direction. So if you have steeper declining slope vs a lower inclining slope on a position vs time graph, would the steeper declining slope have a greater velocity?

P1

http://img20.imageshack.us/img20/7853/001vtt.jpg [Broken]

P2

http://img543.imageshack.us/img543/9262/2001v.jpg [Broken]

P3

http://img80.imageshack.us/img80/1522/3001hs.jpg [Broken]

I have 3 problems that I've been staring at for the last hour or more and I just don't know how to proceed. Normally I have no issues what so ever when data is given. These problems don't have definite numbers so I'm struggling on how to even proceed.

Any guidance on how to get going would be appreciated

Normally I use these 4 equations and I just manipulate the equations and they work great.

X=X0+V0t+.5at2

V=V0+at

V2=V02+2aΔX

S=d/t

I'm attaching 3 links so you can see my physics problems. One last question I'd like to ask just to make sure I answered another problem correctly in my packet. When a problem asks when is its velocity greatest. Do you always go with the the highest positive number, or do you factor in a negative value as well. I know speed doesn't matter which direction your going. Velocity sign (+ or -) on the other hand indicates which direction. So if you have steeper declining slope vs a lower inclining slope on a position vs time graph, would the steeper declining slope have a greater velocity?

P1

http://img20.imageshack.us/img20/7853/001vtt.jpg [Broken]

P2

http://img543.imageshack.us/img543/9262/2001v.jpg [Broken]

P3

http://img80.imageshack.us/img80/1522/3001hs.jpg [Broken]

Last edited by a moderator: