You are Here: Home

# Optimal friction coefficient help? watch

Announcements
1. The mass of the car itself is 900kg. It's balanced on 4 springs with it's weight evenly spread across all 4. People get on the car and they weigh 400kg. What's the optimal friction coefficient of the springs? And explain why?

How do I do this? I'm not sure of which equation to use, I know friction is a force and is measured in Newtons. So do I use k=-F/x ? and make F=ma? What's the value for x?

In the previous part of the question, the weight of the people was 90kg and I had to work out the constant (k) of the spring. But I don't think that's of any use because the k of this question will be different because of the different mass.
2. (Original post by Airess3)
The mass of the car itself is 900kg. It's balanced on 4 springs with it's weight evenly spread across all 4. People get on the car and they weigh 400kg. What's the optimal friction coefficient of the springs? And explain why?

How do I do this? I'm not sure of which equation to use, I know friction is a force and is measured in Newtons. So do I use k=-F/x ? and make F=ma? What's the value for x?

In the previous part of the question, the weight of the people was 90kg and I had to work out the constant (k) of the spring. But I don't think that's of any use because the k of this question will be different because of the different mass.
Whats the ****ing equation then, and then whats k aswell? see your question isnt very clear you see.

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: November 12, 2015
Today on TSR

### Exam Jam 2018

Join thousands of students this half term

### Solo - A Star Wars Story

Poll
Useful resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE