- #1

Wanting to Learn

## Homework Statement

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.

Part A:

How fast are the balloons traveling when they pass Roger's window? (express to 3sig figs with units)

Part B:

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 _.)

## Homework Equations

d = .5(v

_{f}+ v

_{0})t

v

_{f}= 0m/s

v

_{0}= ? 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.