2. (a) A force F1, of magnitude 12V5 N, acts at the point (1, 7) towards the point (7, 10). Another force, F acts at the point (1, 4). Given that F1 and F2 form a couple. Find the cartesian cquation of the line of action of F2 and the magnitude of the couple. (b) An clastic string AB of natural length 2 m has the end A fixed. A load of mass 4kg is attached to the other end B so that the system hangs freely in equilibrium. Find the work that must be done to extend the unloaded string from a length of 2.5 m to 2.9 m.

2. (a) A force F1, of magnitude 12V5 N, acts at the point (1, 7) towards the point (7, 10). Another force, F acts at the point (1, 4). Given that F1 and F2 form a couple. Find the cartesian cquation of the line of action of F2 and the magnitude of the couple. (b) An clastic string AB of natural length 2 m has the end A fixed. A load of mass 4kg is attached to the other end B so that the system hangs freely in equilibrium. Find the work that must be done to extend the unloaded string from a length of 2.5 m to 2.9 m.

Classical Dynamics of Particles and Systems

5th Edition

ISBN:9780534408961

Author:Stephen T. Thornton, Jerry B. Marion

Publisher:Stephen T. Thornton, Jerry B. Marion

Chapter8: Central-force Motion

Section: Chapter Questions

Problem 8.7P

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