Wanting to Learn
Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 0.83 s after passing his window. Roger's room is on the third floor, 15 m above the sidewalk.
How fast are the balloons traveling when they pass Roger's window? (express to 3sig figs with units)
Assuming the balloons are being released from rest, from what floor are they being released? Each floor of the dorm is 5.0 m high. (Express answer as integer. Thus the balloons are coming from the floor number _.)
d = .5(vf + v0)t
vf = 0m/s
v0 = ? m/s
t = 0.83s
d = 15m
The Attempt at a Solution
I plugged in:
15 = .5(0 + v)*0.83
15 = 0.415v
v = 36.14...
I assume units are m/s
When I put 36.1 m/s as the answer (homework is online) it said my answer is incorrect. Where did I do wrong with it?
(I will attempt part B once I have the correct answer for part A.)
Thank you in advance for helping.