- #1
mkylman
- 13
- 0
*SOLVED*Desperately need help -_-
SOLVED
You and a friend each drive 50 km. You travel at 90km/h; your friend travels at 95km/h. How long will your friend wait for you at the end of the trip?
Df(Displacement Final): 50km
Di(Displacement Initial): 0
Vme(My Avg Velocity): 90km/h
Vfriend(etc.): 95km/h
T=?
I don't know! It's like I know I should know them but I can't seem to find anything in the chapter -_-
I attempted first to break this down(since all the equations I know use seconds and meters) via dimensional analysis and this is how it turned out(note: I rounded one of the numbers)
then I did the stupid thing making it m instead of km, resulting in this:
90km=0.000025m 95km=0.000026m
But I don't really know what to do from here; I mean I know that I need to make those conversions but from here I don't know what formula to use!
Were my conversions wrong? Unnecessary?
What formula do I need! Someone help, I have a quiz on this stuff tomorrow -_-
Thanks in advance!
MKylman
SOLVED
Homework Statement
You and a friend each drive 50 km. You travel at 90km/h; your friend travels at 95km/h. How long will your friend wait for you at the end of the trip?
Df(Displacement Final): 50km
Di(Displacement Initial): 0
Vme(My Avg Velocity): 90km/h
Vfriend(etc.): 95km/h
T=?
Homework Equations
I don't know! It's like I know I should know them but I can't seem to find anything in the chapter -_-
The Attempt at a Solution
I attempted first to break this down(since all the equations I know use seconds and meters) via dimensional analysis and this is how it turned out(note: I rounded one of the numbers)
Code:
90km 1h 90km 1m 90km ended up w/ 0.025km/s
----- x ----- = ---- x ---- = ----- for the friend I got 0.026km/s
1h 60m 60m 60s 3600s
then I did the stupid thing making it m instead of km, resulting in this:
90km=0.000025m 95km=0.000026m
But I don't really know what to do from here; I mean I know that I need to make those conversions but from here I don't know what formula to use!
Were my conversions wrong? Unnecessary?
What formula do I need! Someone help, I have a quiz on this stuff tomorrow -_-
Thanks in advance!
MKylman
Last edited: