- #1

rpullo

- 15

- 0

## Homework Statement

*Little Willy, clumsy clot,*

From window sill dislodged a pot.

He shouts below to Little Milly:

"Step aside, it'll knock you silly!"

From window sill dislodged a pot.

He shouts below to Little Milly:

"Step aside, it'll knock you silly!"

The window sill is 35.0 m above the sidewalk where Millly is standing directly below the falling pot. Milly is 1.05 m tall, her ears are 5.00 cm below the top of her head, and she needs 0.400 s to respond to the warning. The speed of sound in air is 340 m/s. What is the minimum height of the pot above the ground at the instant Willy shots his warning if Milly is to avoid being "potted"? Answer in m.

## Homework Equations

v =d/t

d = (v1)t + 0.5a(t^2)

## The Attempt at a Solution

So I first found the time is takes for the sound to reach Milly's ears:

t = d/v

t = (35.0m - 1.0m)/(340m/s)

t = 0.10 s

So the time it takes Milly to receive the warning and respond:

0.10 s + 0.400 s = 0.50 s

I use d = (v1)t + 0.5a(t^2) to find the distance the pot falls:

d = (v1)t + 0.5a(t^2) ...where v1 is 0

d = 0.5(-9.8)(0.50)^2

d = 1.225 m

I'm not sure what to do next or if I even started this question correctly. All input is appreciated!