Any genius/nerds can help me with physics?

@turtle777rescuer
Let's try it..

In a car at a steady speed going in a circle what's the friction coefficient.

First the distance traveled don't matter .

What forces do we have going here..
We have gravity pulling the car down. Then we have the force of the road pushing up on the car..

That's what's called Normal Force or N.

And since the car is balanced up and down..that means that N and gravity cancel out. Which means

N=mg, with g being gravity acceleration...9.8 m/ssquared

N and gravity cancel out because the car is not going up or down.

Then there's the horizontal force that pulls the car to the center..

That force comes from the dude turning the steering wheel, which turns the wheel, which makes the tires push against the asphalt which in turns pushes back and brings the car inward.

That means that the only unbalanced force is the friction force pushing that car inwards . Yes??

I know that by some kind of law I can't remember...Ff = μN (this the equation for maximum friction. Before it starts skidding)

That's what we are looking for ...that little μ
Which is the Friction coefficient.

Where am I going to get that from ??

I have to find another equation that I can equal to that so I can get that N to the other side and keep μ.

I also know that at any point that Ff is also

Ff = MV2/R. ( The 2 means square)

Thats the friction force at any time..but wait!??
I know what that force is right at the skidding point because I have the equation for maximum friction force which is. Ff = μN

Therefore I can say that I want the coefficient just before it starts skidding..
So I make the two equations equal.
Friction force at the moment just before it skids=

μN = Mv2/R

Solving for μ = MV2/RN

We know that N. Normal force is mg from earlier

So my equation becomes..

μ = mv2/Rmg....crossing out m, that leaves...

μ = v 2 (square)/Rg

Where g is the acceleration of gravity 9.8 m/s(square)

I think

@TheHammer see thats pretty much how i have to answer these quesrions on the tests, good job on that one

@turtle777rescuer You imply thinking you have to derive original equations?

What is your actual stumbling-block?

An ordinary Degree or lower course like yours teaches established knowledge, needing you learn the basic formulae and how to apply them. That entails understanding the scientific principles, their algebraic descriptions; and how to manipulate those equations to suit the specific problem.

So for example you learn the primary definitions of stress, strain and elasticity, so given the diameter of a steel rod of quoted tensile strength can calculate its maximum safe tensile load.

Not to derive equations. That happens only in original research. Young has already derived his Modulus rule!


So it should be a matter of the mathematics you learnt at school or in a college maths course later, but before you embarked on a dedicated engineering or physics course.

I assume the maths course, at school or later, to include geometry, trigonometry, circular calculations, exponents and powers, and at a slightly higher level, series, calculus and the laws of logarithms. All these and other topics would be in a single Mathematics Course of all topics, not separate topic courses, which would be a very inefficient way to learn maths.

I would expect the entry qualifications for any engineering course to include fairly high general mathematical skill. The engineering course itself presumably will teach its specifics like force polygons, mass and motion, electrical principles, stress and strain, the properties of heat, fluid dynamics, and so on; but these all use general mathematics including geometry, trigonometry, series, calculus... all bound by algebra.

So assuming you entered your engineering course with a qualification in mathematics, what is it that you really find difficult?

@Renkon amazing thank you

@bsawyer111 and who was the second one? 😯

@turtle777rescuer According to Stephen Hawking, in his book "A brief history of Time", the implication was that Einstein was one and Sir Eddington was the second.

@bsawyer111 is it really that hard to understand... dam

@turtle777rescuer He's comment applies even in this case. Everyone is different in what works for them.

I used to study in a fast food joint. That wouldn't work for most. You need to find what works for you. Only you know yourself best.

@sciguy18 it's first year physics for mechanal engineering, so the basics but it's still hard lol