if a girl travels with a velocity of 20m/s[W] for 10seconds and then accelerates at 2m/s [E] for 4seconds. what is her diplacement after 14seconds? choices are:
a) 64m [W]
b) 216m [W]
c) 264m [W]
d) 280m [W]
e) 416 m [W]
thanks!!
2007-02-03 03:58:22 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
this is on ur HW right?
2007-02-03 04:01:15 · answer #1 · answered by oh yeah! girl 2 · 0⤊ 1⤋
find the distance she runs at 20m/s for 10s
x=vt
x= (20m/s)(10s)
x= 200
find the distance while she accelerates
x=1/2at^2+ vt
x =1/2(2m/s^2)(4s)^2 + 20m/s(4s)
x= 96m
total distance is 200m + 96m = 296m
huhm.... i don't know. Either i did it wrong or the right answer is not here. You should ask your teaher
2007-02-03 12:17:13 · answer #2 · answered by 7 · 0⤊ 0⤋
Mine didn't match either = I got 290m??
2007-02-03 12:35:27 · answer #3 · answered by startrektosnewenterpriselovethem 6 · 0⤊ 0⤋
stmc did it right
2007-02-03 13:28:55 · answer #4 · answered by sojsail 7 · 0⤊ 0⤋
mine didn't match either sorry!
2007-02-03 12:29:36 · answer #5 · answered by Beautiful B 1 · 0⤊ 0⤋