How far does the parachutist fall before his parachute opens?

[kelsybayless]

1. Homework Statement
A parachutist freefalls from a height of 4000 meters above the ground. Graph his distance vs. time as he falls stop your graph when his parachute opens 200 meters

Homework Equations

i tried a couple equations
rate x time=distance
(final velocity)= (initial velocity)+ acceleration(time)

The Attempt at a Solution

i know that the graph is going a downward curve just don't understand how to plot them and the time is what imm trying to figure but it just keeps coming out different.

 

[tiny-tim]

Welcome to PF!

Hi kelsybayless! Welcome to PF!

Use the standard https://www.physicsforums.com/library.php?do=view_item&itemid=204" equation, s = ut + (1/2)at²

 

[JANm]

Hi kelsybayless! Welcome to PF!

Use the standard https://www.physicsforums.com/library.php?do=view_item&itemid=204" equation, s = ut + (1/2)at²

Hello kelsybayless
For the first 3800 meter this suggestion could be right.
mgh=1/2mv^2
Divide out m, h=3800, g=pi^2 so v can be calculated.
greetings Janm