Think you are smart? Well, you probably are... now, all you physics students, help me. puleezzzzz

[MeanMeosh]

bah, i just got my first physics homework and i found out that i have forgotten all my physics from last semester... some help would be really appreciated.

1) John has been running for 16 hr +/- .48 hr. John started running from rest. He has been running at a constant acceleration of .7 km/hr^2 +/- 0.021 km/hr^2. Estimate the distance he has run. Answer in units of km.

2) What is the uncertainty i nthe distance calculated in part 1? answer in units of km. your answer must be within +/- 6%.


Edit: I got #1 (doh, finally remembered that d = .5*a*t^2, but help on #2 would be appreciated...

 

[mrCide]

the answer is 2. what? why are you looking at me like that?

 

[Ranger X]

Go back to the fundamentals ... open your book and look at the forumlas.

 

[MeanMeosh]

bump... some help please.... my damn grade's a 34 so far..

 

[OS]

<< John has been running for 16 hr +/- .48 hr. John started running from rest. He has been running at a constant acceleration of .7 km/hr^2 +/- 0.021 km/hr^2. Estimate the distance he has run. Answer in units of km. >>




No human being can run at a constant acceleration for anything remotely close to 16 hours.

 

[MeanMeosh]

<<

<< John has been running for 16 hr +/- .48 hr. John started running from rest. He has been running at a constant acceleration of .7 km/hr^2 +/- 0.021 km/hr^2. Estimate the distance he has run. Answer in units of km. >>




No human being can run at a constant acceleration for anything remotely close to 16 hours. >>



dude, its physics, it doesnt have to make sense...

 

[notfred]

READ THIS

if I remeber anything right:

position = 0.35(x^2) + x

where position is in km, and x is time in hours.

SO: after 16 hours, John should have travlled 105.6 km, not counting the error calculations.

note* it's been several years since I took either calculus or physics, and the batteries in my TI-89 are dead.