Newton Definition and 527 Threads

If gravity is a force, then the moment the object producing gravity is taken away, it should result in gravity taken away instantaneously. However, why does Einstein say that Newton's classical mechanics are incorrect and that in fact he decided to propose spacetime and not follow what Newton...

Sorry if I posted in the wrong place. Does anyone know where to get the Sir Isaac Newton contest solutions 2007? The site has solutions for 2008, but not of previous years. Thanks.

At what age did Newton encounter and fell in loved with mathematics? I was really surprised when some sources said that he learned trigonometry during his college years and that he didn't really read Euclid's elements until after...

Homework Statement http://img82.imageshack.us/img82/8125/78492134fy0.th.jpg http://g.imageshack.us/thpix.php I need to prove that the left part is equal to the right. I'm not sure how to approach the question. I know that (n over k)=n! : k!(n-k)! but how do I sum all the number from k=0...

Hello, True or False: - According to Newton third law, the algebraic sum of the forces in the system is equal to zero. I think the answer is FALSE because, the third law of Newton says that F1 = - F2 and the " - " is for the direction, so that F1 = F2 in the quantity ==> F1 + F2 \neq 0

Homework Statement A crate of books is to be put on a truck with the help of some planks sloping up at 31◦. The mass of the crate is 70 kg, and the coefficient of sliding friction between it and the planks is 0.4. You and your friends push horizontally with a force ~F . The acceleration of...

If a 10 solar mass star explodes, leaving behind a 5 solar mass black hole, and blowing off an idealized spherical symmetrical (5 solar mass) neutrino shell, would the gravitational field (i.e. curvature of manifold) change? http://en.wikipedia.org/wiki/Supernova p.s. addendum: could Newton...

Hello guys, I am currently busy with this introductory assignment on Newtons Laws. I have tried to solve but i am not sure whether i have the right solution. Please help. Homework Statement Three blocks are stacked on top of each other inside an elevator as shown in the figure. Answer...

Hello, This is my first post on the forum, I hope that I will get an answer for my question as soon as possible. :rolleyes: http://img512.imageshack.us/img512/5765/55503111px2eq6.png Thanks in advance

Homework Statement Two boxes full of books are in contact with each other on a smooth table. Box H has twice the mass of Box G. If you push on box G with a horizontal force F, then box H will expereince a net force of? Homework Equations F =ma The Attempt at a Solution answer from...

Homework Statement A block of mass m=2.0kg is held in equilibrium on an incline of angle=60 degrees by the horizontal force F. a)determine the value of F b)determine the normal force exerted by the incline on the block (ignore friction). Homework Equations Fnet = ma Fnetx = 0...

TNX ! http://img377.imageshack.us/img377/8561/00000qj1.jpg

what is the force work on object B in terms of a ? i know that the frictinon should be bigger than the force mBg for that the object will not fall down. but how to express it in terms of a ?? TNX .

Hello friends, I have a problem in Bernoulli equation and Newton Law. I'm going to calculate how much power is needed to lift up an object with weight W. I'm planning to put the object in a 10 inches diameter. How can I calculate the power needed by the motor to lift up the object? Does...

http://img237.imageshack.us/img237/5499/22gj5.jpg the floor frictionless between D and C : MUs = 0.2 mA=5kg mB=10kg mD=2kg what is the value for Mc keepin MD in static position ? my effort : http://img389.imageshack.us/img389/9196/hwscan00010zf3.png the answer in the book...

Object A placed on a floor frictionless and object B placed on object A. The drag coefficient between A & B is 0.3 The length of A is 1m and the length of B is 30 cm . a force of 100N workin on object B. What is the time take to the edge of object B placed on the edge of object A ? all...

A box put on a cart with velocity of 40m/s. The static drag coefficient between the box and the cart is 0.3. How long (in metes) before the cart stop should the driver start to slow down if he want to stop the cart on minimal time and make the box not move ? im received 544.2 m but the...

Homework Statement You are standing on scales which read weight in Newtons. A 0.50 kg ball is dropped from a height of 1 m into your hands. Your hands drop from chest level to waist level during the catch, a distance of about 25 cm. Your mass is 62 kg. Assuming that you decelerate the ball...

Ok, I have a general question about centrifugal force. Lets say I have an object who moves in a circular path, we know the object is accelerating because the velocity is constantly changing direction, the acceleration is towards the center. Now, where does the centrifugal force comes to...

Could we rewrite the Newton law as F=G\rho\rho1\frac{}{} d^{}2? I' ve read this in a book. Is it right?

I just finished watching a documentary on Newton's involvement in alchemy, and how this influenced his religious views, which can be seen here: http://video.google.com/videoplay?docid=930571660745143381&hl=en At the end of the documentary, it gave Newton's predicted date for the end of...

I'm not sure if either Einstein or Newton said that all frame of reference are equally valid. That from my point of view, the laws of physics is the same from your point of view. All frame reference can be put on an equal footing. I was wondering, can one consider the geocentric view that the...

I had just by chance mentioned something about Albert Einstein today to my colleague when a heated debate began at the office. We were talking as usual when he threw out that although Einstein was an accomplished physicist, Isaac Newton was the greater of the two because of his work in...

[SOLVED] Newton theory of gravity Homework Statement what are the magnitude and direction of the net gravitational force on the 20kg mass. Now this is kinda tricky but there is an 20kg ball on the origin, and two 10kg balls 20cm above the x axis, and one is 5cm right and the other is 5cm...

My question is this: Why are we (as a community) so eager to disregard modifying Newtonian Dynamics (MOND)? Of course it's incredibly accurate on macroscopic scales, but isn't science meant to be progressive? Since Zwicky's observation of galactic cluster rotation in 1922 and the...

Homework Statement According to Newtonian mechanics the momentum of the bus in the preceding problem is p= mv. According to relativity, p = gamma*mv. How does the actual momentum of the bus moving at .99c compare with the momentum it would have if classical mechanics were valid? *Note* The...

How does Maxwell's electrodynamics contradict Newton's mechanics? I read the Maxwell's equations but i am not able to find how those eqns bring up the contradiction. Can anyone explain in detail?

The weight of the cart is 4 N. The weight of the hanging mass is 4 N. Friction of the cart on the track is a constant force of 2 N magnitude. The mass of the string, the mass of the pulley, and the friction of the pulley can be neglected. What is the magnitude of the acceleration of the cart...

Homework Statement A block is shoved up a 22 deg slope with an Initial speed of 1.4 m/s the coefficient of Kinetic friction is .7... a) how far up the slope will hte block get? b) will the block come back down?note the bold is just a sign change, a diffrent possibility 2. Homework Equations...

If he's thought Force must be proportional to the mass and acceleration why didn't he write down the equation in: F=kma form , how did he cancel out the k constant? or did he come to the solution with Galileo's fallen objects experiments and reasoned : a=F/m (a equals to g here of...

Homework Statement Two blocks are in contact on a frictionless table. A horizontol force is applied to one block as shown in Fig 7. If m1 = 2.0 kg, m2 = 1.0 kg, and |F|applied = 3N, find the force of contact between two blocks. ----> -------- | A | B | note: the height of B...

Homework Statement A pulley system is hanging from a Newton meter as shown below. If we assume that gravitational acceleration is 10 m/s^{2}, what will the reading be on the Newton meter as the masses accelerate? a) 3 Kg b) 13 N c) 27 N d) 30 N...

Hi, I have for me a complex question! :( If I get to Mt. Everest (let's say - highest place on Earth), then there is acceleration of my body towards the Earth - because of g - gravity force. Now - question is does Earth have acceleration towards my body - as 3rd Isaac N. law would say...

Uhm i mean, actually how do we predict the estimated roots before we implement this? Because i wonder if the estimated root is too big enough to predict and sometimes time-consuming, is there any way to predict the roots better and accurate before we implement the Newton Raphson's iterative...

You are given a chance to fly back in time with no worry over changing history in bad ways. Knock knock and you enter a college looking for famous Isaac Newton, age 45, in person. He's a real fun in every way - mechanics, theory of gravity, celestial mechanics, calculus, the queen. Also he...

Hi, i have no idea how to start up my program on Newton interpolation. i have solved it manually but I am clueless on how 2 start my program. below represnts the input which i want 2 solve. every 4 lines represnts one problem. the 1st line- n,m where n is no of data points and m is no of...

a box of books weighing 325N moves with a constant velocity across the floor when it is pushed with a force of 425N exerted downward at an angle of 35.2 degree below the horizontal . find the coefficient of kinetic friction between the box and the floor. what i do :please see check it the...

Homework Statement I am trying to understand how these Newton's laws work, specifically with an object on an incline. If a 5.00kg object is attached to a Newton spring scale on an incline (incline makes 30 degrees with the ground), what reading is the scale giving? Homework Equations Fx...

I have E(v) = (mc^2)/(sqrt(1-(v^2/c^2)). I have found the second-order Taylor-polynomial for v=0, and I get: T_2_E(v) = mc^2 + ½mv^2. My teacher asks me, why this equation must be true - what is so special about the second order Taylor-polynomial for v = 0 for E(v)?

Does any1 know where I can find a book or maybe a website that clearly explains how Newton derived all of those physics formulae all from the 2 equations F=ma and Fg=GMm/r^2? One that is not skimpy on the math, and actually shows how we go from one equation to the next.

What is the difference between the two? Does the Newton integral arise from the fundalmental theorem of calculus and the Riemann integral is the Newton integral but more rigorously defined?

...that's what this headline says anyway. There's a lot more to calculus than infinite series... Also by the time Newton came along most of calculus had been discovered. Newton was the one who saw the big picture & showed that it was all part of the same theory.

Or, to write the question in slightly fuller form: Assuming a sufficient level of interest and competence, and very good teachers, could a high school student today understand the calculus better than Newton or Leibniz ever did in their lifetimes? And if not a high school student, then maybe...

Homework Statement The crates are on a horizontal frictionless surface. The woman (wearing golf shoes so that she can get traction) applies a horizontal force F = 50.0N to the 6.00kg crate. a.) what is the magnitude of the acceleration of the 6.00kg crate? b.) what is the tension T in the...

I have searched and searched. I cannot find any record of Isaac Newton performing experiments in mechanics that would have proven his proposed mathematical relations between force, mass, time, and velocity to be true. As far as I have found, Isaac Newton did perform experiments in optics, but...

Hey, I'm new to this forums so I hope I'v posted this in the right section. I'v just started my new job at a large engineering firm, and the chairman has posed a question to all his employee's which I was hoping you could help me with. His Question is as follow; "Where does a Newton come...

On this site http://www.geocities.com/physics_world/mass_paper.pdf It states that the 3 force can be written as... F = M1 x A1 + M2 x A2 Where 1 is the longitudinal component of acceleration and 2 is the transverse component of acceleration. It appears that if there is no...

From the Sir Isaac Newton contest: A 1.0*10^3 kg plane is tryin to make a forced landing on the deck of a 2.0*10^3 kg barge at rest on the surface of a clam sea. THe only frictional force to consider is between the plane's wheels and the deck, this braking force is constant and is equal to...

Please help to find the answer of this question.

Let be the congruence equation with f(x) a Polynomial of grade k then: f(x)=0mod(p) then if we have as a first approximation f(x_{n+1})=0mod(p) then using a linear interpolation: f(x_{n})+f'(x_{n})(x_{n+1}-x_{n})=0mod(p) or...