Go Back   Physics Help Forum > High School and Pre-University Physics Help > Kinematics and Dynamics

Kinematics and Dynamics Kinematics and Dynamics Physics Help Forum

Reply
 
LinkBack Thread Tools Display Modes
Old Jan 20th 2009, 07:21 PM   #1
Junior Member
 
Join Date: Oct 2008
Posts: 11
Unhappy Rocket above Earth Question

How high does a rocket have to go above Earth's surface until its weight is one eighth what it would be on Earth?

help!!
jello17 is offline   Reply With Quote
Old Jan 21st 2009, 07:15 PM   #2
Senior Member
 
skeeter's Avatar
 
Join Date: Aug 2008
Posts: 113
Originally Posted by jello17 View Post
How high does a rocket have to go above Earth's surface until its weight is one eighth what it would be on Earth?

help!!
$\displaystyle W = \frac{GM_e m}{R_e^2}$

$\displaystyle \frac{W}{8} = \frac{GM_e m}{8R_e^2} = \frac{GM_e m}{(\sqrt{8} \cdot R_e)^2}$
skeeter is offline   Reply With Quote
Reply

  Physics Help Forum > High School and Pre-University Physics Help > Kinematics and Dynamics

Tags
earth, question, rocket



Thread Tools
Display Modes


Similar Physics Forum Discussions
Thread Thread Starter Forum Replies Last Post
Question about the rocket - exhaust speed... dokrbb Kinematics and Dynamics 6 Mar 26th 2014 06:40 PM
Simply Rocket huge question why ? tesla2 Special and General Relativity 25 Feb 18th 2013 08:40 PM
A ball lies on the Earth surface, undergoing circular motion together with the Earth. ENRIQUESTEFANINI Advanced Mechanics 5 Jun 20th 2012 06:18 PM
Dymanics-how long was the rocket in the air? cherry_t Kinematics and Dynamics 2 Apr 8th 2010 11:19 PM
Rocket Problem link88 Kinematics and Dynamics 3 Jan 8th 2010 04:49 AM


Facebook Twitter Google+ RSS Feed