Starting from a pillar, you run 220 m east (the +x direction) at an average speed of 4.0 m/s, and then run 280 m west at an average speed of 8.0 m/s to a post.
Calculate your average velocity from pillar to post
I already tried taking the diferance in the distance covered and the differance in time covered and I got -3 m/s.. which is wrong.. But what I did was i diveded 220/4 to get 55 seconds and then 280/8 to get 35 seconds . then I toook the 280-220/35-55 to get -3 m/s but its wrong
2007-09-09 06:15:02 · 1 answers · asked by Walachka 3 in Science & Mathematics ➔ Physics
OOOOOO NVM NVM I figured out where I was confused, its DISPLACEMENT over time not DISTANCE!!!! I got it now yall can still answer though and I give credit to best answer, I got .6667 or 2/3
2007-09-09 06:20:13 · update #1
x1 = 220
x2 = -280
Note that since the question specifically equates east with +x, the velocity during the run west is -8 m/s.
t1 = x1/v1 = 220/4 = 55 s
t2 = x2/v2 = -280/-8 = 35 s
displacement x = x1 + x2 = -60
v(ave) = x / (t1 + t2) = -2/3 m/s
2007-09-10 04:01:49 · answer #1 · answered by kirchwey 7 · 0⤊ 0⤋