[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

*Subject*: RE: [amsat-bb] 400N P3D Rocket*From*: Tony Langdon <tlangdon@xxxxxxxxxxxxxxxxxx>*Date*: Thu, 28 Sep 2000 08:25:19 +1000

> whlie looking at the P3D pictures, i noticed the one of dick daniels > holding the 400 Newton rocket in his hands. it made we wonder > just how much > power is 400N. to satisfy my curiosity i'd thought i'd ask so > here goes: > between me and my bicycle we weigh 115 Kg. if i were to strap > on the P3D > 400N rocket to my bicycle, how long would it take me to > accelerate from a > zero to 100 kilometers per hour (assume no friction and a > level surface)? > thanks in advance. A little physics. :-) 9.81N is the force exerted by a 1kg mass on the ground when it's at rest, i.e. 1kg wt (weight) Therefore, 400N = 400/9.81 kg wt = 40.77 kg wt. Not enough to lift the average adult off the ground, but plenty to push things around in space. :-) Would also be a useful boost for that bicycle. :-) I hope my unit conversion is correct. ;-) NB: The conversion from Newtons to kilogram weight was done by assuming that the accelleration caused by gravity is 9.81 m/s^2 at the Earth's surdace, and 1N is the force required to accelerate 1kg by 1m/s^2. The term "kilogram weight" refers to the weight (reaction force of the supporting surface) on a 1kg mass at rest at sea level. Strictly, "kilogram" is a unit of mass, not weight, and Newtons is more correct to use in this context (not people persist ;) ). I suspect a lot of people already know this, but it's included for informational purposes (and hopefully, my high school physics isn't too rusty! :) ). ---- Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA. To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

- Prev by Date:
**Re: P3D G3RUH 9600 telemetry decoding** - Next by Date:
**RE: 400N P3D Rocket** - Prev by thread:
**Re: 400N P3D Rocket** - Next by thread:
**RE: 400N P3D Rocket** - Index(es):