# Homework Help: Shape factor planning and design

1. Jan 8, 2012

### Peacemakery

1. The problem statement, all variables and given/known data
When a paper cake case falls right way up through the air it quickly reaches terminal velocity. The drag force ,D, acting on the paper cupcake case is given by D=fpAv2(v is squared)
Where p is the density of air which is 1.2 kgm-3
v is the terminal velocity
A is the cross sectional area of the base of the cake case
f is a number having no units called the shape factor

Hi can you help me please. I need to design an experiment to determine the shape factor for empty paper cake cases when they fall
title
hypothesis
Theory
variables
Apparatus
Procedure and the results
IF you cannot provide the answers then questions which would lead me to the answer would be greatly appreciated

2. Jan 8, 2012

### LawrenceC

Design an experiment where you drop the object from different heights. Determine the terminal velocity from the times. Once you have the terminal velocity, what does that tell you?