# Homework Help: Drag Forces

1. Jul 29, 2009

### Zmuffinz

1. The problem statement, all variables and given/known data

Marks: 1 In a recent mystery, the hero saves himself by spreading out a windshield tarpaulin to reduce his terminal velocity. A skydiver of 75 kg mass has a terminal velocity of 60 m/s. If the hero has the same 75 kg mass, the same density as the sky diver, and a drag coefficient twice as large with the tarp, by what factor is his effective area greater than the 0.70 m2 area of the skydiver?

2. Relevant equations

Drag force= 1/2DPairAV^2

3. The attempt at a solution

2. Jul 29, 2009

### Hootenanny

Staff Emeritus
You seem to have forgotten to complete section three.

Last edited: Jul 29, 2009
3. Jul 29, 2009

### Zmuffinz

yea i didnt know what to do for the question, i cant get the density of air or drag coeffient so i cant work anything out by rearranging the equation for A

4. Jul 29, 2009

### Hootenanny

Staff Emeritus
HINT: What do you know about the drag force in both cases?