Quote (Terminsel @ Tue, Sep 15 2009, 11:35pm)

(a)

F = m * a

m = 65kg

F = 720

a = 11.07 m/s^2

Since its at a 22 degree angle we want the cosine of 22 * 11.07 to get the horizontal accerleration.

ahorizontal = a * cos 22

ahorizontal = 11.07*.927 = 10.27 m/s^2

(b)

v=a*t

v=10.27m/s^2*.32s

v= 3.29 m/s (not this velocity is horizontal, assuming he didn't begin flying)

Alright cool that confirms it for sure, I have that as well, I just wanted to make sure I had to use cos and not sin. Thank you both for your help, I'll have another question posted in a minute if you want to make some more fg. (or just help me out, haha)

QUESTION 2:

Suppose that you are standing on a train accelerating at .20g. What minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?

I have no idea how to do this type of problem. I think we are going over this tomorrow, (the work isn't due for a few more days) but I want to get it done and figure this out while I have time.

I'm assuming the goal is to get everything to equal 0 correct?

This post was edited by Tenelen on Sep 15 2009 05:50pm