Go Back   Science Forums Biology Forum Molecular Biology Forum Physics Chemistry Forum > General Science Forums > Physics Forum
Register Search Today's Posts Mark Forums Read

Physics Forum Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.

Helpful physicist needed

Helpful physicist needed - Physics Forum

Helpful physicist needed - Physics Forum. Discuss and ask physics questions, kinematics and other physics problems.

LinkBack Thread Tools Display Modes
Old 11-14-2006, 09:20 PM
Charles Lyttle
Posts: n/a
Default Helpful physicist needed

In that case, d = 0.5*a*t^2.
a=32 ft/sec^2
t=24*3600 sec = 86400sec.
d=0.5*32*86400^2 =1.194e11 ft = 22,621,100 miles.
Now you have to accelerate up for 1/2 the trip and then back down to
match velocities with Mars. Mars moves slower than Earth, so decleration
would have to begin before the halfway point, so you don't get the full
22,621,100 miles. therefore at 1g, the two day trip is only possible
when Mars and Earth are less than about 41,000,000 miles apart and the
velocity of Earth assists (distance is decreasing), rather than hinders.
If the distance is increasing, then extra acceleration is needed to shed
velocity and bring the vehicle to rest relative to Mars before beginning
to accelerate toward Mars. Now go back to a physics book, check how much
energy is needed to accelerate/decelerate the payload, then the fuel
energy density, etc.

If your developer wants to include a 2day trip to Mars, then he should
be sure to have a ship that can accelerate, and can carry enough fuel
for the voyage. No magic ships permitted.

Note that it isn't impossible to get to Mars in 2 days (about one week
out of every century), it just would take all the resources of several
major countries to do so.

Khadim Nasser wrote:
Reply With Quote

helpful , needed , physicist

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Percentage of sunlight needed by plants for photosynthesis? pchris@netcourrier.com Botany Forum 1 06-02-2006 09:11 PM
Physicist Needed Alan Little Physics Forum 6 05-10-2006 10:50 AM
My Dinner With André, the Lapdog Physicist (Humor) Traveler Physics Forum 3 06-04-2005 05:55 PM
MR Physicist needed Bill Williams Physics Forum 0 11-04-2003 07:50 PM
I need help from a physicist about hurricanes. Leonard Abbott Physics Forum 2 10-10-2003 02:56 AM

All times are GMT. The time now is 05:08 PM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Copyright 2005 - 2012 Molecular Station | All Rights Reserved
Page generated in 0.11131 seconds with 16 queries