Physics project: help (highschool stuff)

In summary: Maybe they mean you can't have any additional axles.In summary, the project requires building a wheeled device that will coast down a ramp, travel 3ft on a level surface, and stop quickly in a prescribed area. The device must have at least three wheels made from standard music or computer CDs, attached to one or more axles which may or may not rotate. The wheels must rotate, but the framework cannot. No remote controls or energy sources are allowed. The current idea is to use four wheels attached to threaded bolts as axles and have the wheels create friction against the body to stop the car, but this may not provide enough force. Other suggestions include using counter directed threads on the axles for a more sophisticated
  • #1
physicsman101
2
0
Just was going to see if anyone had any ideas for this project that's due like wedsday.

Objective: Build a wheeled deivce that will coast down a ramp and brake to a stop in a prescribed area.

Permitted materials: Wheels must be made from standard music or computer CD's

The device must have at least three wheels which are attached to one or more axles. The wheels must rotate but the framework cannot rotate. The axels may or may not rotate. The wheels can be cut,drilled,glued together,ect. Only the wheels may touch the ramp and floor. No remote controls allowed the device must be self contained. No energy sources allowed(batteries,pre wound springs..ect.)

The car will roll down a 4ft long 16in high ramp then coast for 3ft on a level surface and after that it needs to stop quickly in order to get a good score...

If anyone has any ideas pls help lol...So far we have four wheels attached to threaded bolts as axles drilled into a piece of wood. The idea is as the wheels roll they will turn down the threads and hit the body creating friction that will hopefully stop the car, but we doubt it will have enough force to stop it. HELP!
 
Physics news on Phys.org
  • #2
physicsman101 said:
Just was going to see if anyone had any ideas for this project that's due like wedsday.

Objective: Build a wheeled deivce that will coast down a ramp and brake to a stop in a prescribed area.

Permitted materials: Wheels must be made from standard music or computer CD's

The device must have at least three wheels which are attached to one or more axles. The wheels must rotate but the framework cannot rotate. The axels may or may not rotate. The wheels can be cut,drilled,glued together,ect. Only the wheels may touch the ramp and floor. No remote controls allowed the device must be self contained. No energy sources allowed(batteries,pre wound springs..ect.)

The car will roll down a 4ft long 16in high ramp then coast for 3ft on a level surface and after that it needs to stop quickly in order to get a good score...

If anyone has any ideas pls help lol...So far we have four wheels attached to threaded bolts as axles drilled into a piece of wood. The idea is as the wheels roll they will turn down the threads and hit the body creating friction that will hopefully stop the car, but we doubt it will have enough force to stop it. HELP!

Sounds like your threaded axle idea is a great approach. It would be nice if you could have counter directed threads on the two sides so the wheels drifted in opposite directions. In the simplest case, your wheels should lock up when they hit the sides (or the end of the bolt if one side wheel drifts away from the cart. With counter threading, you could have a more sophisticated brake with a spring mounted pad to gradually increase the friction. You can't do much better than skidding to stop quickly if you can't touch the floor with anything else.
 
  • #3
physicsman101 said:
Just was going to see if anyone had any ideas for this project that's due like wedsday.

Objective: Build a wheeled deivce that will coast down a ramp and brake to a stop in a prescribed area.

Permitted materials: Wheels must be made from standard music or computer CD's

The device must have at least three wheels which are attached to one or more axles. The wheels must rotate but the framework cannot rotate. The axels may or may not rotate. The wheels can be cut,drilled,glued together,ect. Only the wheels may touch the ramp and floor. No remote controls allowed the device must be self contained. No energy sources allowed(batteries,pre wound springs..ect.)

The car will roll down a 4ft long 16in high ramp then coast for 3ft on a level surface and after that it needs to stop quickly in order to get a good score...

If anyone has any ideas pls help lol...So far we have four wheels attached to threaded bolts as axles drilled into a piece of wood. The idea is as the wheels roll they will turn down the threads and hit the body creating friction that will hopefully stop the car, but we doubt it will have enough force to stop it. HELP!
Seems to me 7 feet of string would do the trick (plus a few extra inches to account for the distance between the axles). The string unwinds from one axle and winds up the other axle as the car rolls. Each end of the string is stapled to a different axle, so when all the string has wound off of one axle, there's no way for the axles to rotate in the same direction anymore. The axle's have to stop rotating.

Now, the tricky part. Unless all 7 feet of string can lie in one layer along the axle, you're going to run into problems keeping the circumference of each axle equal. The easy solution is to put a spool on top of the frame to feed the string instead of using the second axle to feed the thread.

You're not exactly clear about what they mean by the framework can't rotate, nor on the dimensions. If there's to be no other rotating pieces other than the wheels and axles, and you can't fit 7 feet of string on one axle in one layer, you're going to have a problem equalizing the rotation on each axle. Considering each wheel is a computer CD, you could have some pretty thick axles, making it unlikely that you couldn't wind 7 feet of string in a single layer.
 

Related to Physics project: help (highschool stuff)

1. What is the purpose of a physics project in high school?

A physics project in high school is designed to help students apply their knowledge of physics concepts to real-world situations. It allows them to develop critical thinking and problem-solving skills while also exploring their interests in the field of physics.

2. How do I come up with a topic for my physics project?

To come up with a topic for your physics project, think about your interests and what you want to learn more about in the field of physics. You can also look at current events or real-life problems that can be solved using physics principles.

3. What are some good resources for conducting research for a physics project?

Some good resources for conducting research for a physics project include scientific journals, textbooks, reputable websites, and interviews with experts in the field. Your school or local library may also have relevant books and resources available.

4. How should I present my physics project?

Your physics project presentation should include an introduction to the topic, a clear explanation of your research question or hypothesis, a description of your methodology and results, and a conclusion that summarizes your findings. Visual aids such as graphs, diagrams, and images can also enhance your presentation.

5. Can I conduct experiments for my physics project at home?

Yes, you can conduct experiments for your physics project at home as long as you have the necessary materials and follow proper safety precautions. You can also consider using simulations or virtual experiments if you do not have access to certain equipment. It is important to consult with your teacher or a parent before conducting any experiments at home.

Similar threads

  • Introductory Physics Homework Help
Replies
4
Views
1K
  • Introductory Physics Homework Help
Replies
24
Views
5K
  • Introductory Physics Homework Help
Replies
12
Views
2K
  • STEM Educators and Teaching
Replies
3
Views
2K
  • Introductory Physics Homework Help
Replies
1
Views
10K
  • Mechanical Engineering
Replies
9
Views
2K
Replies
2
Views
2K
  • Introductory Physics Homework Help
Replies
2
Views
1K
  • Mechanical Engineering
Replies
11
Views
6K
Back
Top