Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20121013 22:45:05
PseudoForceCan any one explain the concept of PseudoForce to me in simple words? 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #2 20121013 23:42:42
Re: PseudoForcehi Agnishom, You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #3 20121014 01:56:43
Re: PseudoForceHmm.. 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #4 20121014 04:51:57
Re: PseudoForceWell I'd say they are nonexistent forces. Some people find it helps to do certain questions by making up such a force. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #5 20121014 22:35:42
Re: PseudoForce
What should happen in reality? 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #6 20121014 23:33:08
Re: PseudoForceWell the rope has a real force; the tension; and that is what pulls the weight into a circular orbit. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #7 20121015 00:09:20
Re: PseudoForce
That force doesn't exist??!!
Excuse me, Which way are you talking about? 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #8 20121015 05:33:51
Re: PseudoForcehi Agnishom,
Our perception often plays tricks on us. You have probably met lots of visual tricks where lines look longer than they are or bent when they are straight, etc.
I believe in the scientific method. Observe; try to find a theory that fits the facts; and then test it. That's my 'better way'. But I was only joking in suggesting that you discuss this. You can if you want; but it is optional. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #9 20121015 15:17:53
Re: PseudoForce
Ofcourse, there is a force of Inertia acting. 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #10 20121015 18:10:28
Re: PseudoForceInertia is not a force. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #11 20121015 21:19:51
Re: PseudoForceProof that any object rotating in a circle must be continuously accelerating towards the centre. screen shot 2 shows the diagram to prove this. As the angle gets smaller, AC gets closer and closer in length to arcAB so Now for the main proof. See the third screen shot. This shows an object rotating in a circle. It has speed v. Consider the position after it has moved around through a small angle. The change in velocity along the line of the tangent is and along the line of the radius is This change takes place in a small period of time. So the time for one revolution is Now to calculate the two accelerations. I'll do the tangential one first. The part in brackets tends to 1 so the whole tends to zero as the angle tends to zero. So there is no tangential acceleration. Now for the radial acceleration. The minus sign means it acts towards the centre of the circle and is equal to v^2/r in size. So, if an object has to accelerate towards the centre for circular motion, there has to be a centrally acting force to provide it (Newton's second law). Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #12 20121016 23:56:47
Re: PseudoForceEr, I am not yet so well versed at Trig but I will try to read this 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #13 20121017 04:12:58
Re: PseudoForceOK. Ask if anything needs more clarification. You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #14 20121019 01:36:40
Re: PseudoForceSorry for the delay
How? 'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.' 'God exists because Mathematics is consistent, and the devil exists because we cannot prove it' 'Who are you to judge everything?' Alokananda #15 20121019 05:09:23
Re: PseudoForceIt comes from the compound angle formula: Put A = B = x and this becomes Bob You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei 