Calculate stress in the string, physics, Basic Statistics

question..A prevent of huge m1 and bodyweight w1 = m1g goes on a stage frictionless exterior. It is attached by a gentle versatile string moving past over a little frictionless lever to a second clinging prevent of huge m2 and bodyweight w2 =  m2g. What is the speed of the program and what is the stress in the string?


310_stressinstring.png



The plan shows the creates working on each avoid. The creates used on the stops by the sequence can be regarded an measures reaction several,



                              åfx = T = m1ax                 


                              åfy = N – mg = m1ay = 0


                              Applying Newton’s second law to the hanging block, we obtain


                              åfy = m2g – T = m2ay


                                    T = m1a                                   . . . (1)


                                m2g – T = m2a                           . . . (2)


 


                              Including two equations reduces T giving


                                       m2g = (m1 + m2) a


                                     a = m2g/m1+m2


                              Replacing the value of an in formula (1) gives the stress as


T = m1m2 g / m1+m2


Posted Date: 2/7/2012 4:44:36 AM | Location : United States







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