How to Design a Car Powered by a Suspended Mass for a School Project?

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Homework Help Overview

The discussion revolves around designing a car powered by a suspended mass for a school project. The original poster is seeking assistance with a mechanism that should enable the car to move forward using gravitational potential energy from the suspended mass.

Discussion Character

  • Exploratory, Problem interpretation, Assumption checking

Approaches and Questions Raised

  • Participants are questioning the specifics of the setup, including the mass used, the radius of the pulley, and the suspension point's location. The original poster describes their design and the components involved, including a pulley and a steel rod connecting the wheels.

Discussion Status

The discussion is ongoing, with some participants offering clarifications on the problem's requirements. The original poster has provided details about their design but is experiencing issues with the car not moving as intended. There is an emphasis on understanding the mechanics involved rather than reaching a solution.

Contextual Notes

The original poster mentions a deadline for the project, indicating a time constraint. They express frustration over a lack of support from group members and have provided a model of their car design for reference.

I-Need-Help!!
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Hey please help me out here ...i m in grade 11 and i got this assignmnt ..where i have to design a car that will move forward from a suspended mass...i have no idea wot to do ... itz due this frdaypleasez i really need help...none of my grou members are helping me out .
 
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1) Caps don't help. Don't yell, be clear.

2) What is the mass, what is the radius, from what is it suspended? Is the suspension point outside the mechanism (theoretical problem) or inside the mechanism (need more data)

Friday is a long way away. Be clear about the problem, give it to us exactly, and we will try our best to steer you where to go to find the information you need to answer the probelm.
 
I can use any mass that is suitable for my car and the suspension point is outside the mechanism. I did made a car and its done but its not moving :( i used 500 grams mass.
My car design is like..i have the base of the car with four wheels and there is a small pulley atached at the bottom of the car with the steel rod that joins two back wheels together. On top of the base of the car there is a pole,, that's where the mass is suspended from. Then i attach the string to the pulley that is at the bottom of the car and that string is then tied with mass. SO as i release the mass, the pulley should spin and it should make the back wheels move..but the wheels are not moving
:'(
 
https://www.physicsforums.com/attachment.php?attachmentid=11733&stc=1&d=1196117956


model of my car ...instead of using roll of string i added pully
 
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