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 November 4th, 2014, 05:44 AM #11 Senior Member   Joined: Apr 2014 From: Glasgow Posts: 2,166 Thanks: 738 Math Focus: Physics, mathematical modelling, numerical and computational solutions Yes. You would have to write a computer program that calculates the various things based on a set number of initial parameters. Do you know programming? November 4th, 2014, 01:53 PM   #12
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 Originally Posted by Benit13 Yes. You would have to write a computer program that calculates the various things based on a set number of initial parameters. Do you know programming?

No, I'm pretty useless with computers. Thanks for all the work! November 5th, 2014, 02:17 AM #13 Senior Member   Joined: Apr 2014 From: Glasgow Posts: 2,166 Thanks: 738 Math Focus: Physics, mathematical modelling, numerical and computational solutions I think I made a mistake somewhere (didn't take into account g in the weight?) because a colleague of mine found a much easier way of calculating this sort of problem. If you think of the problem in terms of changes in energy instead of a dynamics problem, you are effectively changing kinetic energy into gravitational potential energy. Consequently $\displaystyle mg\Delta h = \frac{1}{2}I\omega_i^2$ Solving for $\displaystyle \omega_i$ using the parameters determined earlier yields [MATH]\omega_i = 1.06/MATH] radians per second, which in turn yields a force of 12,800N needed to knock the punch bag over. I think this is a much more realistic number. I must admit, I facepalmed when he suggested it, because it's such an obvious method which is ideal for solving problems like this. You won't need a computer program for simple physics like this because it can just be done on paper Last edited by Benit13; November 5th, 2014 at 02:20 AM. Tags arts, dummy, force, martial, question, required Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post MathGuruInTraining Probability and Statistics 0 July 9th, 2014 03:34 PM Neb Advanced Statistics 0 September 1st, 2013 11:34 AM justusphung Calculus 4 July 5th, 2013 01:39 AM mr calculus Applied Math 1 February 21st, 2013 03:39 PM Jason Algebra 1 October 22nd, 2007 01:58 AM

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