Recent content by phyzzle

I am not sure what we are talking about anymore. You asked: "Why? There is only one equation that I know of which involves the coefficient of static friction and it allows for a range of forces for a constant coefficient. Are you aware of any formula other than fs≤μsfN which uses μs? If so...

In theory why can't the forces be equal to fs max? The forces would still be that of static friction as opposed to kinetic friction right?

In case you're interested here is the link for the formula. It will put you on page 73, just scroll up to page 71...

Yes I am aware of another formual which uses μs. In Tipler's college physics text, 3rd edition, chapter 5 he has an inequality for the static friction force and an equation for fs max. At least I think that is what your asking, at this point I honestly am not sure of anything. Anyhow thanks...

Okay, I finally get it. Sorry it seems pretty obvious to me now. I hadn't been thinking about the inequality, I was thinking about it conceptually and illogically so. I think I will go post this same question on the monster truck forum. I am sure I will get some equally astute responses.

Dalespam, I have resolved my initial question thanks. If an object is being pushed without moving, the opposing frictional force is equal and opposite to that force pushing on the object. Increase the force a little bit without moving the object and the opposing frictional force will increase...

Okay I understand now. Thanks for putting up with me everyone. For anyone that is interested...

Awesome, I agree with your post completely. And I think we are seeing eye to eye. In your statement; 'I feel the crucial thing to take away is that the the equation above is the maximum 'potential' force that can be applied by a Tyre-surface system. It is always likely to be less.' Can...

Yes indeed, this thread needed a little humor.

Values are not empirically determined, maximum values are determined. And those maximums are very useful.

Thanks for sticking with me on this. I will get it eventually.

Sorry about the above post, I was a little rushed. After looking at the mentioned reference a little closer it was not what I thought it was. Newton's 3rd law clearly shows that static friction is variable and proportional to the applied force. Because the normal force of the car is constant...

I was not saying that the force on the left was proportional to the force on the right of the inequality. It is an inequality because the force on the right is the maximum static friction. The actual friction will be an equation and the applied force will be equal to the static friction and...

Dalespam, thanks for seeing the validity in my question. I agree with most of what you say. If I may take it a step further though, any varying friction in the brake system will result in the same varience of friction between road and tire. The variable frictional force is not a result of the...

Thanks for the welcome! I like this place already. I do not think I am asking two questions. I understand that if you double the mass you double the kinetic energy, I also understand that if you double the mass you double the friction between the road and tires, and this is why Tipler in his...