Recent content by Richard R Richard

Ok, see if we can achieve the same balance on Mars as on Earth ... , could you tell me the air pressure there, the acceleration of gravity, the radius of the planet, the rotation period, and the latitude to which you will compare the measurements? When you define all that, the only thing...

Hi @jbriggs444 , Right, what I mean is that in a physics forum, it is better that we give the hard definition of gravitational interaction, and that the deviations of the "weight" measure that a scale can register, we can define them but never include them in the definition of weight, but yes...

Hi all It is rare to read that, if we are in a science forum we answer as in a science forum, if this were a trade forum, perhaps our definitions would be more lax. I think that no one can go home happily if they provide five different definitions, saying that it does not matter what they...

Hello when you increase the speed, the angle tends to ##\pi / 2## but at the same time the centripetal force increases and this is equal to the tension on the rope, the consequence is that if you try to reach that ideal angle, the tension tends to infinity and There will be no rope that resists...

It is time to establish what is the speed or tension necessary so that in the limit ##\theta## tends to ##\pi / 2## Can these @songoku values be achieved without cutting the rope?

Two forces act on the object, the weight equal to ##W=m\cdot g = 100kg 9.81m /s^2## and the force to lift it, which you say is ##F_l=101kg 9.81m/s^2## Newton's second law tells you that the vector sum of all the forces is equal to the resulting acceleration times the accelerated mass...

Hello, you are right in everything you have deduced. If you divide member by member or both equations you get a direct relationship between the tangent of the angle, the weight, the velocity and the radius. and if you use the relation ##\sin ^ 2 \theta + \cos ^ 2 \theta = 1## to eliminate both...

If there is an exchange of particles, there can be no adiabatic barrier. Please explain better this part of your doubts. Note that the total number of particles is ##N = N_1 + N_2## and you don't know how they were originally distributed in the two volumes ##V_1## and ##V_2## but in the book...

It is an explanatory table in broad strokes, I do not see any gross error that deserves correction

The period is a constant to cross the planet from side to side, it has been calculated in 42 minutes, both to cross any string and to cross the diameter. By the way, another idealization that has to be abstracted is that the planet should not rotate, and if it does, it will only reach the other...

Hi ! Maybe I have gone very to the extreme and it was not the intention. I'm just trying to give an alternative point of view to which in my opinion is the opposite in meaning. I have already agreed that there may be some dynamic friction, but not as the main cause for the centripetal force...

The distance between two points on a circle is a chord. The arc of circumference between these two points is always longer than the chord. When the tire hits the ground, the circumference is elastically compressed, to reduce its length from the arc measure to the chord measure. If we define a...

If the cause is to slide and the effect to bend, then a steel wheel would bend with the same efficiency as a rubber one of the same dimensions and with the same ground conditions. That is not true, 40 years ago I was certain of that when my toy car with bearings greatly improved the grip in the...

Undoubtedly, its exposition is logical, but it has a drawback, the width of the wheel is limited, let's call it ##d##, and if you observe it will have the same longitudinal slip between the inside and outside of the cover regardless of the radius of the curve, it is Say the longitudinal slip is...

I agree that the axis of rotation of the wheel is not perpendicular to the direction of advance or tangential. I just want to clarify that there is not necessarily slip, it is possible that the vehicle receives centripetal force, up to the maximum value that allows static friction in a direction...