The two forces P applied horizontally to the bottom of the symmetrical frame control the vertical motion of the 60 kg cylinder. Determine the constant force P which, if applied when the frame is at rest with B = 120 degrees, will give the cylinder an upward velocity of 3 m/s when the position of B is 60 degrees is passed.
For the instant when the upward acceleration id 20 m/s what is the force R under each of the supporting rollers.
(Please refer attachment for fig.)© BrainMass Inc. brainmass.com March 21, 2019, 3:55 pm ad1c9bdddf
Please refer to the attachment.
Fundamental principle : Part of the total work done by the forces P goes to increase the potential energy of mass m. Balance of the work done (if any) manifests as the kinetic energy of the mass. Hence,
Work done by the forces P = Increase in PE of mass m + KE ...
The expert examines Newton's Laws of Motion. A step by step solution provided.