Physics Help Forum Thrust force and reistant forces

 Thermodynamics and Fluid Mechanics Thermodynamics and Fluid Mechanics Physics Help Forum

 Oct 26th 2017, 04:01 PM #11 Junior Member   Join Date: Oct 2017 Posts: 9 The clasp at a distance of 0.6 C0.6
 Oct 26th 2017, 04:04 PM #12 Senior Member   Join Date: Apr 2015 Location: Somerset, England Posts: 688 Carpenters have a saying "Measure twice cut once" What is the distance from the line of action of the clasp force C to PQ? And are there any other forces acting that have moments about PQ?
 Oct 26th 2017, 04:28 PM #13 Junior Member   Join Date: Oct 2017 Posts: 9 0.4m not 0.6m I dont think there are any other. In a 2 dimensional perspective theres 3 forces. That acting on pq which has no moment, the moment around the hinge which is equal to 0.2xH and the moment around the clasp which is equal to 0.4xH?
 Oct 26th 2017, 04:41 PM #14 Senior Member   Join Date: Apr 2015 Location: Somerset, England Posts: 688 So now you have finally derived the equation I gave you at the beginning. Well done You have already calculated the thrust force so you have two equations in two unknowns (H and C) and you are only required to find one of them.
 Oct 26th 2017, 04:45 PM #15 Junior Member   Join Date: Oct 2017 Posts: 9 Thanks very much for your help
 Oct 26th 2017, 04:49 PM #16 Senior Member   Join Date: Apr 2015 Location: Somerset, England Posts: 688 Unfortunately the teaching of moments is one of the worst areas in Mechanics, made worse by the difference between English and American terminology. But it is very important so come back with more questions as you go along. By the way, what is your course?
 Oct 27th 2017, 01:08 PM #17 Junior Member   Join Date: Oct 2017 Posts: 9 The course is an NVQ Lvl 3 Electrical & Mechanical

 Tags force, forces, reistant, thrust

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