Building a Gravity-Powered Vehicle: 5 Meter Challenge

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Homework Help Overview

The discussion revolves around designing a gravity-powered vehicle that must travel a linear distance of at least 5 meters. The project constraints specify that only gravitational potential energy can be utilized, excluding any elastic potential energy sources.

Discussion Character

  • Exploratory, Conceptual clarification, Problem interpretation

Approaches and Questions Raised

  • Participants explore various design ideas, including using dowel rods for axles and considering different materials for wheels. There are suggestions for incorporating a pulley system with a falling weight to propel the vehicle, as well as ideas for using a flywheel or water steam as propulsion methods. Questions arise about practical implementation, such as preventing the string from catching on the vehicle.

Discussion Status

The discussion is active, with participants sharing ideas and seeking clarification on design challenges. Some guidance has been offered regarding the use of sketches and prototypes to identify potential design flaws, indicating a productive direction in the conversation.

Contextual Notes

Participants are required to create their own wheels and axle systems without using pre-made components, which adds complexity to the design process. There is an emphasis on ensuring that the vehicle operates solely on gravitational potential energy.

anna.kate
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i have to build a vehicle "powered soely by gravitational potential energy that will travel at least a linewar distance of 5 meters under its own power. no elastic potential energy (such as a mousetrap) allowed"

i was wondering if anyone out there had any idea on where to start or knew of a website that would provide blueprints of some sort.


thanks a million!
 
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What ideas have you come up with so far?
 
well, we have to create our own wheels and axle system... like we can't use anything that was made for a wheel or an axle, so i was thinking i would use dowel rods for the axel, and depending on how heavy it was, i would use cds or pvc endcaps for the wheels... and then maybe lead fishing sinkers for the weight? i just don't know where to start...
 
There are lots of possibilities. How about a pulley arrangement where a falling lead weight (attached to the pulley) turns your axle to propel the car?
 
The pulley system could also incorporate a flywheel in order to keep going after the weight has reached the bottom (one could maybe also start the motion of the vehicle only after the weight dropped - engage drive mechanism - after the flywheel have build up speed)

Another idea - use a water steam coming from the bottom of a container to drive the vehicle.
 
tide, what you said is exactly what i was thinking... but where do i start? and how do i get the string not to catch anywhere on the car? like, do i need a plastic piece of some sort?
 
anna.kate said:
tide, what you said is exactly what i was thinking... but where do i start? and how do i get the string not to catch anywhere on the car? like, do i need a plastic piece of some sort?

Start by making a sketch followed by a prototype to help discover design flaws - such as string getting caught. You may need guide grooves or holes or some kind of guard such as plastic or screening material.

Good luck!
 
thanks for your help!
 

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